diff --git a/bindings/cxx/gpiod.hpp b/bindings/cxx/gpiod.hpp
index 8b4a8f9..fb7f1fa 100644
--- a/bindings/cxx/gpiod.hpp
+++ b/bindings/cxx/gpiod.hpp
@@ -486,7 +486,7 @@ public:
 	 * @brief Possible bias settings.
 	 */
 	enum : int {
-		BIAS_AS_IS = 1,
+		BIAS_UNKNOWN = 1,
 		/**< Line's bias state is unknown. */
 		BIAS_DISABLE,
 		/**< Line's internal bias is disabled. */
diff --git a/bindings/cxx/line.cpp b/bindings/cxx/line.cpp
index 5a907db..c605790 100644
--- a/bindings/cxx/line.cpp
+++ b/bindings/cxx/line.cpp
@@ -17,7 +17,7 @@ const ::std::map<int, int> bias_mapping = {
 	{ GPIOD_LINE_BIAS_PULL_UP,	line::BIAS_PULL_UP, },
 	{ GPIOD_LINE_BIAS_PULL_DOWN,	line::BIAS_PULL_DOWN, },
 	{ GPIOD_LINE_BIAS_DISABLE,	line::BIAS_DISABLE, },
-	{ GPIOD_LINE_BIAS_AS_IS,	line::BIAS_AS_IS, },
+	{ GPIOD_LINE_BIAS_UNKNOWN,	line::BIAS_UNKNOWN, },
 };
 
 } /* namespace */
diff --git a/bindings/cxx/tests/tests-line.cpp b/bindings/cxx/tests/tests-line.cpp
index 3c7ea39..7ea9b3a 100644
--- a/bindings/cxx/tests/tests-line.cpp
+++ b/bindings/cxx/tests/tests-line.cpp
@@ -35,7 +35,7 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE_FALSE(line.is_used());
 		REQUIRE_FALSE(line.is_open_drain());
 		REQUIRE_FALSE(line.is_open_source());
-		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_UNKNOWN);
 	}
 
 	SECTION("exported line")
@@ -54,7 +54,7 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.is_used());
 		REQUIRE_FALSE(line.is_open_drain());
 		REQUIRE_FALSE(line.is_open_source());
-		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_UNKNOWN);
 	}
 
 	SECTION("exported line with flags")
@@ -75,7 +75,7 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.is_used());
 		REQUIRE(line.is_open_drain());
 		REQUIRE_FALSE(line.is_open_source());
-		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_UNKNOWN);
 	}
 
 	SECTION("exported open source line")
@@ -95,7 +95,7 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.is_used());
 		REQUIRE_FALSE(line.is_open_drain());
 		REQUIRE(line.is_open_source());
-		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_UNKNOWN);
 	}
 
 	SECTION("exported bias disable line")
diff --git a/bindings/python/gpiodmodule.c b/bindings/python/gpiodmodule.c
index b48a83a..e0cfab3 100644
--- a/bindings/python/gpiodmodule.c
+++ b/bindings/python/gpiodmodule.c
@@ -68,7 +68,7 @@ enum {
 };
 
 enum {
-	gpiod_BIAS_AS_IS = 1,
+	gpiod_BIAS_UNKNOWN = 1,
 	gpiod_BIAS_DISABLE,
 	gpiod_BIAS_PULL_UP,
 	gpiod_BIAS_PULL_DOWN,
@@ -374,9 +374,9 @@ static PyObject *gpiod_Line_bias(gpiod_LineObject *self,
 		return Py_BuildValue("I", gpiod_BIAS_PULL_DOWN);
 	case GPIOD_LINE_BIAS_DISABLE:
 		return Py_BuildValue("I", gpiod_BIAS_DISABLE);
-	case GPIOD_LINE_BIAS_AS_IS:
+	case GPIOD_LINE_BIAS_UNKNOWN:
 	default:
-		return Py_BuildValue("I", gpiod_BIAS_AS_IS);
+		return Py_BuildValue("I", gpiod_BIAS_UNKNOWN);
 	}
 }
 
@@ -2527,8 +2527,8 @@ static gpiod_ConstDescr gpiod_ConstList[] = {
 	},
 	{
 		.typeobj = &gpiod_LineType,
-		.name = "BIAS_AS_IS",
-		.val = gpiod_BIAS_AS_IS,
+		.name = "BIAS_UNKNOWN",
+		.val = gpiod_BIAS_UNKNOWN,
 	},
 	{
 		.typeobj = &gpiod_LineType,
diff --git a/bindings/python/tests/gpiod_py_test.py b/bindings/python/tests/gpiod_py_test.py
index 3093a1c..7d790f3 100755
--- a/bindings/python/tests/gpiod_py_test.py
+++ b/bindings/python/tests/gpiod_py_test.py
@@ -241,7 +241,7 @@ class LineInfo(MockupTestCase):
             self.assertTrue(line.is_requested())
             self.assertTrue(line.is_open_drain())
             self.assertFalse(line.is_open_source())
-            self.assertEqual(line.bias(), gpiod.Line.BIAS_AS_IS)
+            self.assertEqual(line.bias(), gpiod.Line.BIAS_UNKNOWN)
 
     def test_exported_open_drain_line(self):
         with gpiod.Chip(mockup.chip_path(0)) as chip:
@@ -259,7 +259,7 @@ class LineInfo(MockupTestCase):
             self.assertTrue(line.is_requested())
             self.assertTrue(line.is_open_drain())
             self.assertFalse(line.is_open_source())
-            self.assertEqual(line.bias(), gpiod.Line.BIAS_AS_IS)
+            self.assertEqual(line.bias(), gpiod.Line.BIAS_UNKNOWN)
 
     def test_exported_open_source_line(self):
         with gpiod.Chip(mockup.chip_path(0)) as chip:
@@ -277,7 +277,7 @@ class LineInfo(MockupTestCase):
             self.assertTrue(line.is_requested())
             self.assertFalse(line.is_open_drain())
             self.assertTrue(line.is_open_source())
-            self.assertEqual(line.bias(), gpiod.Line.BIAS_AS_IS)
+            self.assertEqual(line.bias(), gpiod.Line.BIAS_UNKNOWN)
 
     def test_exported_bias_disable_line(self):
         with gpiod.Chip(mockup.chip_path(0)) as chip:
diff --git a/include/gpiod.h b/include/gpiod.h
index 75da84c..1aaa6cd 100644
--- a/include/gpiod.h
+++ b/include/gpiod.h
@@ -284,7 +284,7 @@ enum {
  * @brief Possible internal bias settings.
  */
 enum {
-	GPIOD_LINE_BIAS_AS_IS = 1,
+	GPIOD_LINE_BIAS_UNKNOWN = 1,
 	/**< The internal bias state is unknown. */
 	GPIOD_LINE_BIAS_DISABLE,
 	/**< The internal bias is disabled. */
@@ -337,7 +337,7 @@ bool gpiod_line_is_active_low(struct gpiod_line *line) GPIOD_API;
  * @brief Read the GPIO line bias setting.
  * @param line GPIO line object.
  * @return Returns GPIOD_LINE_BIAS_PULL_UP, GPIOD_LINE_BIAS_PULL_DOWN,
- *         GPIOD_LINE_BIAS_DISABLE or GPIOD_LINE_BIAS_AS_IS.
+ *         GPIOD_LINE_BIAS_DISABLE or GPIOD_LINE_BIAS_UNKNOWN.
  */
 int gpiod_line_bias(struct gpiod_line *line) GPIOD_API;
 
diff --git a/lib/core.c b/lib/core.c
index c6fb474..9ee84cf 100644
--- a/lib/core.c
+++ b/lib/core.c
@@ -485,7 +485,7 @@ int gpiod_line_bias(struct gpiod_line *line)
 	if (line->info_flags & GPIOLINE_FLAG_BIAS_PULL_DOWN)
 		return GPIOD_LINE_BIAS_PULL_DOWN;
 
-	return GPIOD_LINE_BIAS_AS_IS;
+	return GPIOD_LINE_BIAS_UNKNOWN;
 }
 
 bool gpiod_line_is_used(struct gpiod_line *line)
diff --git a/tests/tests-line.c b/tests/tests-line.c
index d6264af..88857a0 100644
--- a/tests/tests-line.c
+++ b/tests/tests-line.c
@@ -418,7 +418,7 @@ GPIOD_TEST_CASE(set_flags_bias, 0, { 8 })
 	ret = gpiod_line_request_input(line, GPIOD_TEST_CONSUMER);
 	g_assert_cmpint(ret, ==, 0);
 	gpiod_test_return_if_failed();
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 
 	ret = gpiod_line_set_flags(line,
 		GPIOD_LINE_REQUEST_FLAG_BIAS_DISABLE);
@@ -762,7 +762,7 @@ GPIOD_TEST_CASE(misc_flags, 0, { 8 })
 	g_assert_false(gpiod_line_is_used(line));
 	g_assert_false(gpiod_line_is_open_drain(line));
 	g_assert_false(gpiod_line_is_open_source(line));
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 
 	config.request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT;
 	config.consumer = GPIOD_TEST_CONSUMER;
@@ -775,7 +775,7 @@ GPIOD_TEST_CASE(misc_flags, 0, { 8 })
 	g_assert_true(gpiod_line_is_used(line));
 	g_assert_true(gpiod_line_is_open_drain(line));
 	g_assert_false(gpiod_line_is_open_source(line));
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 	g_assert_cmpint(gpiod_line_direction(line), ==,
 			GPIOD_LINE_DIRECTION_OUTPUT);
 
@@ -790,7 +790,7 @@ GPIOD_TEST_CASE(misc_flags, 0, { 8 })
 	g_assert_true(gpiod_line_is_used(line));
 	g_assert_false(gpiod_line_is_open_drain(line));
 	g_assert_true(gpiod_line_is_open_source(line));
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 	g_assert_cmpint(gpiod_line_direction(line), ==,
 			GPIOD_LINE_DIRECTION_OUTPUT);
 
@@ -829,7 +829,7 @@ GPIOD_TEST_CASE(misc_flags_work_together, 0, { 8 })
 	g_assert_true(gpiod_line_is_used(line));
 	g_assert_true(gpiod_line_is_open_drain(line));
 	g_assert_false(gpiod_line_is_open_source(line));
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 	g_assert_true(gpiod_line_is_active_low(line));
 	g_assert_cmpint(gpiod_line_direction(line), ==,
 			GPIOD_LINE_DIRECTION_OUTPUT);
@@ -846,7 +846,7 @@ GPIOD_TEST_CASE(misc_flags_work_together, 0, { 8 })
 	g_assert_true(gpiod_line_is_used(line));
 	g_assert_false(gpiod_line_is_open_drain(line));
 	g_assert_true(gpiod_line_is_open_source(line));
-	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_UNKNOWN);
 	g_assert_true(gpiod_line_is_active_low(line));
 
 	gpiod_line_release(line);
