diff --git a/libhammer.pc.in b/libhammer.pc.in
index 97ded13..ae71664 100644
--- a/libhammer.pc.in
+++ b/libhammer.pc.in
@@ -1,4 +1,4 @@
-prefix=/usr
+prefix=${prefix}
 exec_prefix=${prefix}
 includedir=${prefix}/include
 libdir=${exec_prefix}/lib