diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4276ad93..348b302d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,11 @@ if (HAVE_STD_CPP11_FLAG)
     int main() {}" FMT_CPP11_UNISTD_H)
   if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
     set(CPP11_FLAG -std=c++11)
+  else ()
+    check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)
+    if (HAVE_STD_CPP11_FLAG)
+      set(CPP11_FLAG -std=gnu++11)
+    endif ()
   endif ()
   set(CMAKE_REQUIRED_FLAGS )
 else ()