diff --git a/builddefs/common_rules.mk b/builddefs/common_rules.mk
index d6f91b10e4..0e5731b4b8 100644
--- a/builddefs/common_rules.mk
+++ b/builddefs/common_rules.mk
@@ -58,7 +58,7 @@ endif
 #---------------- C Compiler Options ----------------
 
 ifeq ($(strip $(LTO_ENABLE)), yes)
-    CDEFS += -flto
+    CDEFS += -flto=auto
     CDEFS += -DLTO_ENABLE
 endif