diff --git a/libdrm.pc.in b/libdrm.pc.in
index f8764c46..7a9b04ea 100644
--- a/libdrm.pc.in
+++ b/libdrm.pc.in
@@ -1,3 +1,5 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@