diff --git a/libc/include/string.h b/libc/include/string.h
index 89b2a45..47bdd72 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -37,7 +37,7 @@
 
 __BEGIN_DECLS
 
-#if defined(__USE_BSD)
+#if defined(__USE_BSD) || defined(__USE_GNU)
 #include <strings.h>
 #endif