diff --git a/platform.mk b/platform.mk
index 7d311ef01aa66846dd827859474539171baf8c76..f47bbffe589afe43e83a4d6e139b58f582414889 100644
--- a/platform.mk
+++ b/platform.mk
@@ -56,7 +56,7 @@ $(1)-install: $(2)/$(1)$(3)
 	$(INSTALL) $$^ $(PREFIX)/$(5)
 ifneq ($$(strip $$($(1)_HEADERS)),)
 	$(INSTALL) -d $(PREFIX)/$(INCLUDEDIR)/$(1)
-	$(INSTALL) $$($(1)_HEADERS) $(PREFIX)/$(INCLUDEDIR)/$(1)
+	$(INSTALL) -m 644 $$($(1)_HEADERS) $(PREFIX)/$(INCLUDEDIR)/$(1)
 endif
 .PHONY: $(1)-clean $(1)-install
 endef