diff --git a/Makefile.include b/Makefile.include
index 6eaa239ff..01482ca9a 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -29,17 +29,6 @@ BB = $(shell echo $(BOARD)|tr 'a-z' 'A-Z')
 CPUDEF = $(shell echo $(CPU)|tr 'a-z' 'A-Z')
 CFLAGS += -DBOARD=$(BB) -DCPU_$(CPUDEF)
 
-# Add `-fno-delete-null-pointer-checks` flag iff the compiler supports it.
-# GCC removes moves tests whether `x == NULL`, if previously `x` or even `x->y` was accessed.
-# 0x0 might be a sane memory location for embedded systems, so the test must not be removed.
-# Right now clang does not use the *delete-null-pointer* optimization, and does not understand the parameter.
-# Related issues: #628, #664.
-ifeq ($(shell $(CC) -fno-delete-null-pointer-checks -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
-ifeq ($(shell LANG=C $(CC) -fno-delete-null-pointer-checks -E - 2>&1 1>/dev/null </dev/null | grep warning: | grep -- -fno-delete-null-pointer-checks),)
-CFLAGS += -fno-delete-null-pointer-checks
-endif
-endif
-
 export CFLAGS
 
 export BINDIR =$(CURDIR)/bin/$(BOARD)/
@@ -72,6 +61,17 @@ endif
 endif
 endif
 
+# Add `-fno-delete-null-pointer-checks` flag iff the compiler supports it.
+# GCC removes moves tests whether `x == NULL`, if previously `x` or even `x->y` was accessed.
+# 0x0 might be a sane memory location for embedded systems, so the test must not be removed.
+# Right now clang does not use the *delete-null-pointer* optimization, and does not understand the parameter.
+# Related issues: #628, #664.
+ifeq ($(shell $(CC) -fno-delete-null-pointer-checks -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
+ifeq ($(shell LANG=C $(CC) -fno-delete-null-pointer-checks -E - 2>&1 1>/dev/null </dev/null | grep warning: | grep -- -fno-delete-null-pointer-checks),)
+CFLAGS += -fno-delete-null-pointer-checks
+endif
+endif
+
 # your binaries to link
 BASELIBS += $(BINDIR)$(BOARD)_base.a
 BASELIBS += $(BINDIR)${PROJECT}.a