diff --git a/src/ntbtls.pc.in b/src/ntbtls.pc.in
index 6e59dc8..7fab1ba 100644
--- a/src/ntbtls.pc.in
+++ b/src/ntbtls.pc.in
@@ -1,14 +1,14 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 includedir=@includedir@
 libdir=@libdir@
 host=@NTBTLS_CONFIG_HOST@
 api_version=@NTBTLS_CONFIG_API_VERSION@
 
 Name: ntbtls
 Description: The Not Too Bad TLS Library
 Requires: gpg-error
 Version: @PACKAGE_VERSION@
-Cflags: @NTBTLS_CONFIG_CFLAGS@
-Libs: @NTBTLS_CONFIG_LIBS@
+Cflags: -I${includedir} @NTBTLS_CONFIG_CFLAGS@
+Libs: -L${libdir} @NTBTLS_CONFIG_LIBS@
 URL: https://www.gnupg.org/software/ntbtls/index.html