diff --git a/src/rebar_ct.erl b/src/rebar_ct.erl
index a66bdce..f9e9b4e 100644
--- a/src/rebar_ct.erl
+++ b/src/rebar_ct.erl
@@ -127,7 +127,7 @@ make_cmd(TestDir, Config) ->
     IncludeDir = filename:join(Cwd, "include"),
     case filelib:is_dir(IncludeDir) of
         true ->
-            Include = " -I \"" ++ IncludeDir ++ "\"";
+            Include = " -include \"" ++ IncludeDir ++ "\"";
         false ->
             Include = ""
     end,