diff --git a/include/complex.h b/include/complex.h
index 33c7940b3324..0702541c44aa 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -36,6 +36,9 @@
 #define	_Complex	__complex__
 #endif
 #define	_Complex_I	((float _Complex)1.0i)
+#endif
+
+#ifdef __generic
 _Static_assert(__generic(_Complex_I, float _Complex, 1, 0),
     "_Complex_I must be of type float _Complex");
 #endif