diff --git a/kraken/KREngine-common.h b/kraken/KREngine-common.h
index 6a79d78..c2c6430 100755
--- a/kraken/KREngine-common.h
+++ b/kraken/KREngine-common.h
@@ -32,6 +32,7 @@
 #pragma once
 
 #define KRENGINE_MAX_GPU_COUNT 4
+#define KRENGINE_MAX_FRAMES_IN_FLIGHT 2
 #define KRENGINE_DEBUG_GPU_LABELS 1
 #define KRENGINE_DEBUG_GPU_LABEL_MAX_LEN 128