diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 48e577d98..5ad588857 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -1,7 +1,6 @@
 
 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc -Wall 	\
-	-isystem $(gccincdir) -pipe -D __ARM__ \
-	-fno-strict-aliasing
+	-pipe -D __ARM__ -fno-strict-aliasing
 
 
 machine-$(CONFIG_ARCH_IMX)	   := imx
diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
index 2ecbe01dd..8f3bc7173 100644
--- a/arch/blackfin/Makefile
+++ b/arch/blackfin/Makefile
@@ -1,7 +1,6 @@
 
 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc -Wall 	\
-	-isystem $(gccincdir) -pipe \
-	-fno-strict-aliasing
+	-pipe -fno-strict-aliasing
 
 
 board-$(CONFIG_MACH_IPE337)	:= ipe337
diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile
index 9756aad99..0299b794e 100644
--- a/arch/ppc/Makefile
+++ b/arch/ppc/Makefile
@@ -1,6 +1,6 @@
 
 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc -Wall -ffixed-r14 	\
-	-isystem $(gccincdir) -meabi -Wstrict-prototypes -D __PPC__ -D CONFIG_PPC \
+	-pipe -meabi -Wstrict-prototypes -D __PPC__ -D CONFIG_PPC \
 	-fno-strict-aliasing
 
 ifdef CONFIG_RELOCATABLE
diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index 9794c1141..6622fe89a 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -1,8 +1,6 @@
 
 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc -Wall \
-	-isystem $(gccincdir) -pipe \
-	-fno-strict-aliasing
-
+	-pipe -fno-strict-aliasing
 
 machine-y	   := sandbox