Index: flow/gsl/gslloader-oggvorbis.c
===================================================================
--- flow/gsl/gslloader-oggvorbis.c.orig
+++ flow/gsl/gslloader-oggvorbis.c
@@ -25,7 +25,7 @@
 #include <vorbis/vorbisfile.h>
 #include <string.h>
 #include <unistd.h>
-
+#include <string.h>
 
 /* --- structures --- */
 typedef struct