diff --git a/source/gl_sky_clip.c b/source/gl_sky_clip.c
index 228cb09..d3a1ebb 100644
--- a/source/gl_sky_clip.c
+++ b/source/gl_sky_clip.c
@@ -29,12 +29,11 @@
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
-
 #ifdef HAVE_STRING_H
-#include <string.h>
+# include <string.h>
 #endif
 #ifdef HAVE_STRINGS_H
-#include <strings.h>
+# include <strings.h>
 #endif
 
 #include <stdarg.h>