diff --git a/codec2.pc.in b/codec2.pc.in
index ecca704..94fca12 100644
--- a/codec2.pc.in
+++ b/codec2.pc.in
@@ -1,6 +1,5 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-libdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@
-includedir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@/codec2
+libdir=@CMAKE_INSTALL_LIBDIR@
+includedir=@CMAKE_INSTALL_INCLUDEDIR@/codec2
 
 Name: codec2
 Description: A speech codec for 2400 bit/s and below