diff --git a/lib/Makefile b/lib/Makefile
index 888db2114..773b20c61 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -122,7 +122,6 @@ ifneq ($(ZSTD_LEGACY_SUPPORT), 0)
 ifeq ($(shell test $(ZSTD_LEGACY_SUPPORT) -lt 8; echo $$?), 0)
 	ZSTD_FILES += $(shell ls legacy/*.c | $(GREP) 'v0[$(ZSTD_LEGACY_SUPPORT)-7]')
 endif
-	CPPFLAGS +=
 endif
 CPPFLAGS  += -DZSTD_LEGACY_SUPPORT=$(ZSTD_LEGACY_SUPPORT)