diff --git a/libclc/libclc.pc.in b/libclc/libclc.pc.in
--- a/libclc/libclc.pc.in
+++ b/libclc/libclc.pc.in
@@ -1,4 +1,4 @@
-includedir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@
+includedir=@CMAKE_INSTALL_INCLUDEDIR@
 libexecdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_DATADIR@/clc
 
 Name: libclc