diff --git a/src/main/blackbox/blackbox.c b/src/main/blackbox/blackbox.c
index 6e7153cd8..602beff5a 100644
--- a/src/main/blackbox/blackbox.c
+++ b/src/main/blackbox/blackbox.c
@@ -517,7 +517,7 @@ static void writeIntraframe(void)
 static void writeInterframe(void)
 {
     int x;
-    int32_t deltas[5];
+    int32_t deltas[7];
 
     blackboxValues_t *blackboxCurrent = blackboxHistory[0];
     blackboxValues_t *blackboxLast = blackboxHistory[1];