diff --git a/pipi/pipi.pc.in b/pipi/pipi.pc.in
index 424171a..5d57e42 100644
--- a/pipi/pipi.pc.in
+++ b/pipi/pipi.pc.in
@@ -1,4 +1,5 @@
 prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@