diff --git a/libs/freetdm/freetdm.pc.in b/libs/freetdm/freetdm.pc.in
index 53ccb94ba7..0b563f9840 100644
--- a/libs/freetdm/freetdm.pc.in
+++ b/libs/freetdm/freetdm.pc.in
@@ -5,6 +5,7 @@ prefix=@prefix@
 exec_prefix=${prefix}
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
+modulesdir=@modinstdir@
 
 Name: FreeTDM
 Description: