diff --git a/CMakeLists.txt b/CMakeLists.txt
index 973a60733..ebd89be45 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -215,7 +215,9 @@ endif(ALTCPU)
 find_package(MPI REQUIRED)
 
 if ("${MPI_CXX_INCLUDE_DIRS}" STREQUAL "")
-	include_directories("${MPI_CXX_INCLUDE_PATH}")
+	if (NOT "${MPI_CXX_INCLUDE_PATH}" STREQUAL "")
+		include_directories("${MPI_CXX_INCLUDE_PATH}")
+	endif()
 else()
 	include_directories("${MPI_CXX_INCLUDE_DIRS}")
 endif()