diff --git a/tools/mcstat/Makefile.in b/tools/mcstat/Makefile.in
index 416dbfa4..fe35ca36 100644
--- a/tools/mcstat/Makefile.in
+++ b/tools/mcstat/Makefile.in
@@ -10,7 +10,8 @@ MANDIR=@MANDIR@
 MCKERNEL_INCDIR=@MCKERNEL_INCDIR@
 KDIR ?= @KDIR@
 ARCH=@ARCH@
-CFLAGS=-Wall -O -I. -I${MCKERNEL_INCDIR}
+IHKDIR ?= $(VPATH)/../../../ihk/linux/include/
+CFLAGS=-Wall -O -I. -I${MCKERNEL_INCDIR} -I${IHKDIR}
 LDFLAGS=@LDFLAGS@
 VPATH=@abs_srcdir@
 TARGET=mcstat