diff --git a/Makefile b/Makefile
index a95654df031e..78a0ae1662f8 100644
--- a/Makefile
+++ b/Makefile
@@ -553,7 +553,7 @@ ifdef building_out_of_srctree
 	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
 endif
 
-ifneq ($(shell $(CC) --version 2>&1 | grep clang),)
+ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
 ifneq ($(CROSS_COMPILE),)
 CLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
diff --git a/init/Kconfig b/init/Kconfig
index 60b239d75b11..7bebea307eb7 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -35,7 +35,7 @@ config GCC_VERSION
 	default 0
 
 config CC_IS_CLANG
-	def_bool $(success,$(CC) --version | grep -q clang)
+	def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
 
 config LD_IS_LLD
 	def_bool $(success,$(LD) -v | head -n 1 | grep -q LLD)