diff --git a/hurricane/cmake_modules/FindHURRICANE.cmake b/hurricane/cmake_modules/FindHURRICANE.cmake
index c7a7b7df..37f0635a 100644
--- a/hurricane/cmake_modules/FindHURRICANE.cmake
+++ b/hurricane/cmake_modules/FindHURRICANE.cmake
@@ -140,4 +140,12 @@ IF(UNIX)
   HURRICANE_CHECK_LIBRARIES(HURRICANE_GRAPHICAL ${HURRICANE_FIND_REQUIRED})
   HURRICANE_CHECK_LIBRARIES(HURRICANE_PYTHON    ${HURRICANE_FIND_REQUIRED})
 
+#
+# Adds -Wall to the C/C++ flags.
+#
+  SET(CMAKE_C_FLAGS_DEBUG     "-g -Wall" CACHE STRING "Debug options." FORCE)
+  SET(CMAKE_CXX_FLAGS_DEBUG   "-g -Wall" CACHE STRING "Debug options." FORCE)
+  SET(CMAKE_C_FLAGS_RELEASE   "-O3 -DNDEBUG -Wall" CACHE STRING "Release options." FORCE)
+  SET(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG -Wall" CACHE STRING "Release options." FORCE)
+
 ENDIF(UNIX)