diff --git a/CMakeLists.txt b/CMakeLists.txt
index 574150c05..109e96889 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -566,6 +566,14 @@ foreach (module ${_modules})
 endforeach (module)
 
 # Install pkg-config support file
+set(pc_req_public "")
+if (_usewcs AND WCSLIB_FOUND)
+    list(APPEND pc_req_public "wcslib")
+endif()
+if (_usefits AND CFITSIO_FOUND)
+    list(APPEND pc_req_public "cfitsio")
+endif()
+list(JOIN pc_req_public " " pc_req_public)
 CONFIGURE_FILE("casacore.pc.in" "casacore.pc" @ONLY)
 set(CASA_PKGCONFIG_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
 INSTALL(FILES "${CMAKE_CURRENT_BINARY_DIR}/casacore.pc" DESTINATION "${CASA_PKGCONFIG_INSTALL_PREFIX}")
diff --git a/casacore.pc.in b/casacore.pc.in
index 6881300df..d0a01b240 100644
--- a/casacore.pc.in
+++ b/casacore.pc.in
@@ -9,4 +9,4 @@ Version: @PROJECT_VERSION@
 Requires: @pc_req_public@
 Requires.private: @pc_req_private@
 Libs: -L${libdir} @PRIVATE_LIBS@
-Cflags: -I${includedir} -I@WCSLIB_INCLUDE_DIR@
+Cflags: -I${includedir}