diff --git a/maint/codes-base.pc.in b/maint/codes-base.pc.in
index 4c51193274425d0e9a6bba2b0d7c5e84e21ded89..3774cdab296c19c04e55c17c6e1b2beacf7caa61 100644
--- a/maint/codes-base.pc.in
+++ b/maint/codes-base.pc.in
@@ -1,7 +1,7 @@
 prefix = @prefix@
 exec_prefix = @exec_prefix@
 libdir=@libdir@
-includedir=@includedir@/../
+includedir=@includedir@
 ross_cflags=@ROSS_CFLAGS@
 ross_ldflags=@ROSS_LDFLAGS@
 ross_libs=@ROSS_LIBS@