diff --git a/libbase58.pc.in b/libbase58.pc.in
index 0dd00b2..be2438d 100644
--- a/libbase58.pc.in
+++ b/libbase58.pc.in
@@ -7,3 +7,4 @@ Name: @PACKAGE_NAME@
 Description: Library for Bitcoin's base58 encoding.
 Version: @PACKAGE_VERSION@
 Libs: -L${libdir} -lbase58
+Cflags: -I${includedir}