--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,7 +155,7 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
 
     message(STATUS "Detected GCC version 4.7+")
 
-    set(NORMAL_CXX_FLAGS "-std=gnu++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-declarations")
+    set(NORMAL_CXX_FLAGS "-std=gnu++11 -Wall -Wold-style-cast -pedantic-errors -Wmissing-declarations")
     set(NORMAL_CXX_FLAGS "${NORMAL_CXX_FLAGS} -Wno-error=deprecated-declarations") # updated version of physfs is not available on some platforms so we keep using deprecated functions, see #958
 
     if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
@@ -177,7 +177,7 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=bfd")
     endif()
 
-    set(NORMAL_CXX_FLAGS "-std=c++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-prototypes")
+    set(NORMAL_CXX_FLAGS "-std=c++11 -Wall -Wold-style-cast -pedantic-errors -Wmissing-prototypes")
     set(NORMAL_CXX_FLAGS "${NORMAL_CXX_FLAGS} -Wno-error=deprecated-declarations") # updated version of physfs is not available on some platforms so we keep using deprecated functions, see #958
     set(RELEASE_CXX_FLAGS "-O2")
     set(DEBUG_CXX_FLAGS "-g -O0")