diff --git a/make/defs.mk b/make/defs.mk
index 7a639022..005e79cd 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -933,7 +933,8 @@ ifeq ($(CC),$(GCC))
 	GCC_NO_OPT_FLAGS = \
 		-fno-inline-functions-called-once \
 		-fno-tree-loop-optimize \
-		-fno-early-inlining
+		-fno-early-inlining \
+		-no-default-inline
 else
   ifeq ($(CC),$(CLANG))
 	BUILD_CFLAGS      += -Werror
@@ -946,9 +947,9 @@ ifeq ($(USE_COMPILER_OPTIMIZATION_OPTS),true)
 	BUILD_CPPFLAGS    += -funroll-loops -O3
 else
 	NO_OPT_FLAGS = \
-		-O0 -g -fno-inline -fno-default-inline -fno-omit-frame-pointer -fno-builtin -fno-optimize-sibling-calls \
+		-O0 -g -fno-inline -fno-omit-frame-pointer \
+		-fno-builtin -fno-optimize-sibling-calls \
 		$(GCC_NO_OPT_FLAGS)
-
 #		-fconserve-stack
 
 	_NO_OPT_FLAGS = \