diff --git a/libsodium.pc.in b/libsodium.pc.in
index c1d43725..6a983d5e 100644
--- a/libsodium.pc.in
+++ b/libsodium.pc.in
@@ -1,5 +1,5 @@
 prefix=@prefix@
-exec_prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@