diff --git a/lib/legacy/zstd_v04.c b/lib/legacy/zstd_v04.c
index 56bf4522..19fda898 100644
--- a/lib/legacy/zstd_v04.c
+++ b/lib/legacy/zstd_v04.c
@@ -74,7 +74,7 @@ extern "C" {
 /*-*************************************
 *  Debug
 ***************************************/
-#include "debug.h"
+#include "../common/debug.h"
 #ifndef assert
 #  define assert(condition) ((void)0)
 #endif