diff --git a/config/rules.mk b/config/rules.mk
index c9f3160cfb0c..a74cdd43ce86 100644
--- a/config/rules.mk
+++ b/config/rules.mk
@@ -704,7 +704,7 @@ alldep::
 endif # TIERS
 endif # SUPPRESS_DEFAULT_RULES
 
-ifeq ($(filter s,$(MAKEFLAGS)),)
+ifeq ($(findstring s,$(filter-out --%, $(MAKEFLAGS))),)
 ECHO := echo
 QUIET :=
 else
diff --git a/js/src/config/rules.mk b/js/src/config/rules.mk
index c9f3160cfb0c..a74cdd43ce86 100644
--- a/js/src/config/rules.mk
+++ b/js/src/config/rules.mk
@@ -704,7 +704,7 @@ alldep::
 endif # TIERS
 endif # SUPPRESS_DEFAULT_RULES
 
-ifeq ($(filter s,$(MAKEFLAGS)),)
+ifeq ($(findstring s,$(filter-out --%, $(MAKEFLAGS))),)
 ECHO := echo
 QUIET :=
 else