diff --git a/src/common.h b/src/common.h
index a2894a50..78d38d6e 100644
--- a/src/common.h
+++ b/src/common.h
@@ -20,8 +20,8 @@
 #include <stddef.h>
 #include <stdarg.h>
 #include <ctype.h>
-#  ifdef HAVE_STRING_H
-#include <string.h>
+#ifdef HAVE_STRING_H
+#  include <string.h>
 #endif
 #ifdef HAVE_STDLIB_H
 #  include <stdlib.h>