diff --git a/mac/Makefile.am b/mac/Makefile.am
index d80c460..e9dcb6b 100644
--- a/mac/Makefile.am
+++ b/mac/Makefile.am
@@ -1,7 +1,7 @@
 lib_LTLIBRARIES = libhidapi.la
 libhidapi_la_SOURCES = hid.c
 libhidapi_la_LDFLAGS = $(LTLDFLAGS)
-AM_CPPFLAGS = -I../hidapi/
+AM_CPPFLAGS = -I$(top_srcdir)/hidapi/
 #libhidapi_la_LIBADD = $(LIBS_HIDRAW)
 
 hdrdir = $(includedir)/hidapi