diff --git a/Lib/test/test_cmd_line.py b/Lib/test/test_cmd_line.py
index fc0e3a728a6..d63dfa19f9d 100644
--- a/Lib/test/test_cmd_line.py
+++ b/Lib/test/test_cmd_line.py
@@ -135,12 +135,6 @@ class CmdLineTest(unittest.TestCase):
             self.exit_code('-c', 'pass'),
             0)
 
-        # Test handling of non-ascii data
-        command = "assert(ord('\xe9') == 0xe9)"
-        self.assertEqual(
-            self.exit_code('-c', command),
-            0)
-
 
 def test_main():
     test.support.run_unittest(CmdLineTest)
diff --git a/Misc/NEWS b/Misc/NEWS
index 5eaf640633a..1dd15d6cf25 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,7 +13,8 @@ Core and Builtins
 -----------------
 
 - Issue #3705: fix crash when given a non-ascii value on the command line for
-  the "-c" and "-m" parameters.
+  the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
+  although under Windows it fails at a later point.
 
 - Issue #3279: Importing site at interpreter was failing silently because the
   site module uses the open builtin which was not initialized at the time.
diff --git a/Modules/main.c b/Modules/main.c
index 2148ccca477..5a84cc22bcc 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -287,7 +287,7 @@ Py_Main(int argc, wchar_t **argv)
 {
 	int c;
 	int sts;
-	wchar_t *command = NULL;
+	char *command = NULL;
 	wchar_t *filename = NULL;
 	wchar_t *module = NULL;
 	FILE *fp = stdin;
@@ -299,6 +299,7 @@ Py_Main(int argc, wchar_t **argv)
 	int version = 0;
 	int saw_unbuffered_flag = 0;
 	PyCompilerFlags cf;
+	char *oldloc;
 
 	cf.cf_flags = 0;
 
@@ -309,19 +310,30 @@ Py_Main(int argc, wchar_t **argv)
 
 	while ((c = _PyOS_GetOpt(argc, argv, PROGRAM_OPTS)) != EOF) {
 		if (c == 'c') {
-			size_t len;
+			size_t r1, r2;
+			oldloc = setlocale(LC_ALL, NULL);
+			setlocale(LC_ALL, "");
+			r1 = wcslen(_PyOS_optarg);
+			r2 = wcstombs(NULL, _PyOS_optarg, r1);
+			if (r2 == (size_t) -1)
+				Py_FatalError(
+				   "cannot convert character encoding of -c argument");
+			if (r2 > r1)
+				r1 = r2;
+			r1 += 2;
 			/* -c is the last option; following arguments
 			   that look like options are left for the
 			   command to interpret. */
-
-			len = wcslen(_PyOS_optarg) + 1 + 1;
-			command = (wchar_t *)malloc(sizeof(wchar_t) * len);
+			command = (char *)malloc(r1);
 			if (command == NULL)
 				Py_FatalError(
 				   "not enough memory to copy -c argument");
-			wcscpy(command, _PyOS_optarg);
-			command[len - 2] = '\n';
-			command[len - 1] = 0;
+			r2 = wcstombs(command, _PyOS_optarg, r1);
+			if (r2 > r1-1)
+				Py_FatalError(
+				    "not enough memory to copy -c argument");
+			strcat(command, "\n");
+			setlocale(LC_ALL, oldloc);
 			break;
 		}
 
@@ -531,18 +543,8 @@ Py_Main(int argc, wchar_t **argv)
 	}
 
 	if (command) {
-		PyObject *commandObj = PyUnicode_FromUnicode(
-		                           command, wcslen(command));
+		sts = PyRun_SimpleStringFlags(command, &cf) != 0;
 		free(command);
-		if (commandObj != NULL) {
-			sts = PyRun_SimpleStringFlags(
-				_PyUnicode_AsString(commandObj), &cf) != 0;
-		}
-		else {
-			PyErr_Print();
-			sts = 1;
-		}
-		Py_DECREF(commandObj);
 	} else if (module) {
 		sts = RunModule(module, 1);
 	}
diff --git a/Python/import.c b/Python/import.c
index 13e46ad9a95..9c077fe8a66 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -2804,7 +2804,6 @@ call_find_module(char *name, PyObject *path)
 {
 	extern int fclose(FILE *);
 	PyObject *fob, *ret;
-	PyObject *pathobj;
 	struct filedescr *fdp;
 	char pathname[MAXPATHLEN+1];
 	FILE *fp = NULL;
@@ -2848,9 +2847,9 @@ call_find_module(char *name, PyObject *path)
 		fob = Py_None;
 		Py_INCREF(fob);
 	}
-	pathobj = PyUnicode_DecodeFSDefault(pathname);
-	ret = Py_BuildValue("NN(ssi)",
-		      fob, pathobj, fdp->suffix, fdp->mode, fdp->type);
+	ret = Py_BuildValue("Os(ssi)",
+		      fob, pathname, fdp->suffix, fdp->mode, fdp->type);
+	Py_DECREF(fob);
 	PyMem_FREE(found_encoding);
 
 	return ret;
@@ -2861,9 +2860,7 @@ imp_find_module(PyObject *self, PyObject *args)
 {
 	char *name;
 	PyObject *path = NULL;
-	if (!PyArg_ParseTuple(args, "es|O:find_module", 
-		                  Py_FileSystemDefaultEncoding, &name, 
-						  &path))
+	if (!PyArg_ParseTuple(args, "s|O:find_module", &name, &path))
 		return NULL;
 	return call_find_module(name, path);
 }