diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5995870..f697656 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,10 @@ option(FEA_BUILD_GUI "Build Qt GUI" OFF)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
 
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} -O3 -fopenmp")
+include(FindOpenMP)
+if(OPENMP_FOUND)
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} -O3 -fopenmp")
+endif(OPENMP_FOUND)
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)