diff --git a/lib/memcpy.c b/lib/memcpy.c
index 437f622b2..d36cef20c 100644
--- a/lib/memcpy.c
+++ b/lib/memcpy.c
@@ -2,7 +2,7 @@
    if the source overlaps with the destination.
    Return DESTADDR. */
 
-#ifdef HAVE_CONFIG_H
+#if HAVE_CONFIG_H
 # include <config.h>
 #endif