diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 275b6b39..93db7ea4 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -1,6 +1,6 @@
 AM_LDFLAGS          = -module -avoid-version -shared
 AM_CFLAGS           = -W -Wall -Wextra -std=gnu99
-AM_CPPFLAGS         = -I../src -U_FORTIFY_SOURCE
+AM_CPPFLAGS         = -I$(top_srcdir)/src -U_FORTIFY_SOURCE
 AM_CPPFLAGS        += -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_GNU_SOURCE -D_DEFAULT_SOURCE
 AM_CPPFLAGS        += $(lite_CFLAGS)