diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8e46275..b505ec5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -788,7 +788,6 @@ if(NOT MSVC)
   # Details at http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1459
   string(APPEND CMAKE_CXX_FLAGS " -Wall")
   string(APPEND CMAKE_CXX_FLAGS " -Wextra")
-  string(APPEND CMAKE_CXX_FLAGS " -Werror=return-type")
   string(APPEND CMAKE_CXX_FLAGS " -Wno-missing-field-initializers")
   string(APPEND CMAKE_CXX_FLAGS " -Wno-type-limits")
   string(APPEND CMAKE_CXX_FLAGS " -Wno-array-bounds")