diff --git a/ykcs11/ykcs11.pc.in b/ykcs11/ykcs11.pc.in
index 30999f9..1e85f0b 100644
--- a/ykcs11/ykcs11.pc.in
+++ b/ykcs11/ykcs11.pc.in
@@ -35,5 +35,3 @@ Description: Yubico PIV PKCS#11 Module
 URL: https://www.yubico.com/
 Version: @VERSION@
 Libs: -L${libdir} -lykcs11
-Cflags: -I${includedir}/ykpiv
-