diff --git a/gcc/config/i386/linux-unwind.h b/gcc/config/i386/linux-unwind.h
index 36ee370..415f7a3 100644
--- a/gcc/config/i386/linux-unwind.h
+++ b/gcc/config/i386/linux-unwind.h
@@ -106,7 +106,7 @@ x86_64_fallback_frame_state (struct _Unwind_Context *context,
    signal-turned-exceptions for them.  There's also no configure-run for
    the target, so we can't check on (e.g.) HAVE_SYS_UCONTEXT_H.  Using the
    target libc version macro should be enough.  */
-#if !(__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
+#if defined __GLIBC__ && !(__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
 
 #include <signal.h>
 #include <sys/ucontext.h>