diff --git a/CMakeLists.txt b/CMakeLists.txt
index dce953b..72fdbd5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,7 +40,7 @@ else()
   endif()
 
   # Enable full warnings
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}-Wall -pedantic -Wextra")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -pedantic -Wextra")
 
   # Find Threads
   find_package (Threads)