diff --git a/debian/rules b/debian/rules
index 9278a8f1..c8d2ef21 100755
--- a/debian/rules
+++ b/debian/rules
@@ -817,8 +817,8 @@ build-wasm/compiler-rt-%:
 	@echo "Using cmake: $(CMAKE_BIN)"
 	mkdir -p "$@"
 # remove unsupported flags
-	STAGE_2_CFLAGS=`echo $(STAGE_2_CFLAGS) | sed 's/-fcf-protection//g'`
-	STAGE_2_CXXFLAGS=`echo $(STAGE_2_CXXFLAGS) | sed 's/-fcf-protection//g'`
+	STAGE_2_CFLAGS=`echo $(STAGE_2_CFLAGS) | sed -e 's/-fcf-protection//g'`
+	STAGE_2_CXXFLAGS=`echo $(STAGE_2_CXXFLAGS) | sed -e 's/-fcf-protection//g'`
 
 	$(CMAKE_BIN) -B "$@" -S compiler-rt/lib/builtins/ \
 		-G Ninja \