diff --git a/core/config.mk b/core/config.mk
index 46fe15e8e..dbdd2861f 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -556,7 +556,7 @@ endif
 
 # Default R8 behavior when USE_R8 is not specified.
 ifndef USE_R8
-  USE_R8 := true
+  USE_R8 := false
 endif
 
 #