diff --git a/Makefile.am b/Makefile.am
index b265703..2c01c6c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-ACLOCAL_AMFLAGS = -I .
+ACLOCAL_AMFLAGS = -I m4
 
 AUTOMAKE_OPTIONS = foreign
 
diff --git a/buildconf b/buildconf
index ed3f81d..434a308 100755
--- a/buildconf
+++ b/buildconf
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 ${LIBTOOLIZE:-libtoolize} --copy --automake --force
-ACLOCAL_FLAGS="-I . $ACLOCAL_FLAGS"
+ACLOCAL_FLAGS="-I m4 $ACLOCAL_FLAGS"
 ${ACLOCAL:-aclocal} $ACLOCAL_FLAGS
 ${AUTOHEADER:-autoheader}
 ${AUTOCONF:-autoconf}
diff --git a/reentrant.m4 b/m4/reentrant.m4
similarity index 100%
rename from reentrant.m4
rename to m4/reentrant.m4