diff --git a/jack.pc.in b/jack.pc.in
index a3cc4a29..3a6a11d7 100644
--- a/jack.pc.in
+++ b/jack.pc.in
@@ -3,6 +3,7 @@ exec_prefix=@PREFIX@
 libdir=@LIBDIR@
 includedir=@INCLUDEDIR@
 server_libs=-L@LIBDIR@ -l@SERVERLIB@
+jack_implementation=jack2
 
 Name: jack
 Description: the Jack Audio Connection Kit: a low-latency synchronous callback-based media server