diff --git a/src/pseudotalloc/Makefile.am b/src/pseudotalloc/Makefile.am
index 3c78bba..b631eca 100644
--- a/src/pseudotalloc/Makefile.am
+++ b/src/pseudotalloc/Makefile.am
@@ -1,4 +1,5 @@
-AM_CFLAGS = -Wall -I. $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include
+AM_CPPFLAGS = -I. $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include
+AM_CFLAGS = -Wall
 
 if ENABLE_PSEUDOTALLOC