diff --git a/core/cpufeatures.c b/core/cpufeatures.c
index c6754abb..a8de2baa 100644
--- a/core/cpufeatures.c
+++ b/core/cpufeatures.c
@@ -510,6 +510,19 @@ static const struct cpu_feature cpu_features_table[] = {
 	-1, -1, -1,
 	NULL, },
 
+	/*
+	 * ISAv3.0B firmware-stop-support
+	 * Opal fallback for shallow stop states
+	 */
+#ifdef HAVE_LITTLE_ENDIAN
+	{ "firmware-stop-supported",
+	CPU_P9,
+	ISA_V3_0B, USABLE_HV|USABLE_OS,
+	HV_CUSTOM, OS_CUSTOM,
+	-1, -1, -1,
+	NULL, },
+#endif
+
 	/*
 	 * ISAv3.0B Hypervisor Virtualization Interrupt
 	 * Also associated system registers, LPCR EE, HEIC, HVICE,