diff --git a/config/vtkm.pc.in b/config/vtkm.pc.in
index 9bc8b41b0..adf9e2bff 100644
--- a/config/vtkm.pc.in
+++ b/config/vtkm.pc.in
@@ -17,5 +17,5 @@ libdir=${exec_prefix}/lib
 Name: VTKm
 Description: The VTKm library
 Version: @VTKm_VERSION@
-Cflags: -I${includedir}/vtkm-@CMAKE_INSTALL_PREFIX@
+Cflags: -I${includedir} -I${includedir}/vtkm/thirdparty/diy/vtkmdiy/include/ -I${includedir}/vtkm/thirdparty/lcl/vtkmlcl/
 Libs: -L${libdir}@lib_args@
diff --git a/config/vtkm_config.mk.in b/config/vtkm_config.mk.in
index d67bb3929..8627acf37 100644
--- a/config/vtkm_config.mk.in
+++ b/config/vtkm_config.mk.in
@@ -24,5 +24,7 @@ VTKm_ENABLE_OSMESA_CONTEXT = @VTKm_ENABLE_OSMESA_CONTEXT@
 VTKm_ENABLE_EGL_CONTEXT = @VTKm_ENABLE_EGL_CONTEXT@
 VTKm_ENABLE_MPI = @VTKm_ENABLE_MPI@
 
-VTKm_INCLUDE_FLAGS = -I $(VTKm_DIR)/include/vtkm-@VTKm_VERSION_MAJOR@.@VTKm_VERSION_MINOR@
+VTKm_INCLUDE_DIR = $(VTKm_DIR)/include/vtkm-@VTKm_VERSION_MAJOR@.@VTKm_VERSION_MINOR@
+VTKm_INCLUDE_FLAGS = -I$(VTKm_INCLUDE_DIR) -I$(VTKm_INCLUDE_DIR)/vtkm/thirdparty/diy/vtkmdiy/include/ -I$(VTKm_INCLUDE_DIR)/vtkm/thirdparty/lcl/vtkmlcl/
+
 VTKm_LIB_FLAGS = -L $(VTKm_DIR)/lib@lib_args@