diff --git a/cmake/Modules/OpmCompile.cmake b/cmake/Modules/OpmCompile.cmake
index fdc9d64d5..821c936e6 100644
--- a/cmake/Modules/OpmCompile.cmake
+++ b/cmake/Modules/OpmCompile.cmake
@@ -18,6 +18,8 @@ macro (opm_compile opm)
   if (SILENCE_CROSSMODULE_WARNINGS)
      include_directories("${PROJECT_SOURCE_DIR}")
      include_directories (SYSTEM ${${opm}_INCLUDE_DIRS})
+     set (${opm}_INCLUDE_DIR "${PROJECT_SOURCE_DIR}")
+     set (${opm}_INCLUDE_DIRS ${${opm}_INCLUDE_DIR} ${${opm}_INCLUDE_DIRS})
   else()
      set (${opm}_INCLUDE_DIR "${PROJECT_SOURCE_DIR}")
      set (${opm}_INCLUDE_DIRS ${${opm}_INCLUDE_DIR} ${${opm}_INCLUDE_DIRS})