diff --git a/source/nan_warn.mk b/source/nan_warn.mk
index 66a3fa01745..a80066872ff 100644
--- a/source/nan_warn.mk
+++ b/source/nan_warn.mk
@@ -137,8 +137,6 @@ ifeq ($(CCC),g++)
     LEVEL_2_CPP_WARNINGS += -Wcast-qual
     LEVEL_2_CPP_WARNINGS += -Wcast-align
     # deliberately disable aggregate-return warnings
-    LEVEL_2_CPP_WARNINGS += -Wstrict-prototypes
-    LEVEL_2_CPP_WARNINGS += -Wmissing-prototypes
     LEVEL_2_CPP_WARNINGS += -Wredundant-decls 
     LEVEL_2_CPP_WARNINGS += -Wreorder
     LEVEL_2_CPP_WARNINGS += -Wctor-dtor-privacy