diff --git a/Makefile.am b/Makefile.am
index 93c0b5a..b1d4687 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,6 @@
 SUBDIRS = hcore
 
-AM_CPPFLAGS+= -I"$(abs_srcdir)/hcore/include"
+AM_CPPFLAGS+= -I"$(top_srcdir)/hcore/include"
 
 bin_PROGRAMS = harikoff
 harikoff_SOURCES = main.cpp
diff --git a/configure.ac b/configure.ac
index 5fd22a9..69c0ca0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,7 @@ AC_PROG_CXX
 AC_PROG_RANLIB
 AM_PROG_AR
 
-AM_CPPFLAGS=m4_normalize(["-I\"\$(abs_top_srcdir)/include\""])
+AM_CPPFLAGS=m4_normalize(["-I\"\$(top_srcdir)/include\""])
 
 AC_SUBST([AM_CPPFLAGS])
 
diff --git a/hcore/Makefile.am b/hcore/Makefile.am
index dbfc28d..720257a 100644
--- a/hcore/Makefile.am
+++ b/hcore/Makefile.am
@@ -1,4 +1,4 @@
-AM_CPPFLAGS+= -I"$(abs_top_srcdir)/hcore/include"
+AM_CPPFLAGS+= -I"$(top_srcdir)/hcore/include"
 
 noinst_LIBRARIES = libhcore.a
 libhcore_a_SOURCES = mind.cpp