diff --git a/core/config.mk b/core/config.mk
index dabdfde96d..e24ef98fc3 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -327,7 +327,7 @@ endif
 ifeq ($(HOST_OS),darwin)
 dir := $(HOST_OS)-$(HOST_ARCH)
 endif
-OLD_FLEX := prebuilt/$(HOST_PREBUILT_TAG)/flex/flex-2.5.4a$(HOST_EXECUTABLE_SUFFIX)
+OLD_FLEX := prebuilts/misc/$(HOST_PREBUILT_TAG)/flex/flex-2.5.4a$(HOST_EXECUTABLE_SUFFIX)
 
 ifeq ($(HOST_OS),darwin)
 # Mac OS' screwy version of java uses a non-standard directory layout