diff --git a/CMakeLists.txt b/CMakeLists.txt
index ff221ffef..72c6a510b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -373,7 +373,7 @@ if(WITH_PROF)
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pg")
 endif()
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wuninitialized -Wno-deprecated-declarations")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wuninitialized -Wno-deprecated-declarations -Wno-unused-result")
 if(OPTION_OMP)
     find_package(OpenMP)
     if(OPENMP_FOUND)