diff --git a/src/debug.c b/src/debug.c
index 33b8f38..bab5add 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -28,9 +28,10 @@
 #include <stdarg.h>
 #include <regex.h>
 
-#include "libzzuf.h"
 #include "debug.h"
 
+extern int _zzuf_debug;
+
 void zzuf_debug(const char *format, ...)
 {
     va_list args;