diff --git a/arch/x86_64/src/common/Toolchain.defs b/arch/x86_64/src/common/Toolchain.defs
index d82500482ee..f61ddb99dc4 100644
--- a/arch/x86_64/src/common/Toolchain.defs
+++ b/arch/x86_64/src/common/Toolchain.defs
@@ -180,7 +180,7 @@ endif
 
 CC = $(CROSSDEV)gcc
 CXX = $(CROSSDEV)g++
-CPP = $(CROSSDEV)gcc -E -x c
+CPP = $(CROSSDEV)gcc -E -P -x c
 LD = $(CROSSDEV)ld
 STRIP = $(CROSSDEV)strip --strip-unneeded
 AR = $(CROSSDEV)ar rcs