diff --git a/m4/c17.m4 b/m4/c17.m4
index 1df3131f..b9bf884f 100644
--- a/m4/c17.m4
+++ b/m4/c17.m4
@@ -3,9 +3,15 @@ AC_DEFUN([AX_CHECK_C17],
     [AX_APPEND_FLAG([-std=gnu17])],
     [AX_CHECK_COMPILE_FLAG([-std=c17],
         [AX_APPEND_FLAG([-std=c17])],
-        [AX_CHECK_COMPILE_FLAG([-std=c99],
-            [AX_APPEND_FLAG([-std=c99])],
-            [AC_MSG_ERROR([C compiled does not support at least C99!])])
+        [AX_CHECK_COMPILE_FLAG([-std=gnu11],
+            [AX_APPEND_FLAG([-std=gnu11])],
+            [AX_CHECK_COMPILE_FLAG([-std=c11],
+                [AX_APPEND_FLAG([-std=c11])],
+                [AX_CHECK_COMPILE_FLAG([-std=c99],
+                    [AX_APPEND_FLAG([-std=c99])],
+                    [AC_MSG_ERROR([C compiled does not support at least C99!])])
+                ])
+            ])
         ])
     ])
 ])