Index: libc/Makefile.toolchain
===================================================================
--- libc/Makefile.toolchain	(revision 25b0e6a7a58aae15fdd78041df3db0d184f6d2ee)
+++ libc/Makefile.toolchain	(revision cf4a82392e2e531adcc4ea3efef573197358c03b)
@@ -28,5 +28,5 @@
 
 DEFS = -DARCH=$(ARCH)
-CFLAGS = -fno-builtin -fomit-frame-pointer -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 -nostdlib -nostdinc -I$(LIBC_PREFIX)/include
+CFLAGS = -fno-builtin -fomit-frame-pointer -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 -nostdlib -nostdinc -I$(LIBC_PREFIX)/include -I$(LIBC_PREFIX)/arch/$(ARCH)/include
 LFLAGS = -M
 AFLAGS =