diff --git a/include/pybind11/cast.h b/include/pybind11/cast.h
index 5ddfdf76f..976d28266 100644
--- a/include/pybind11/cast.h
+++ b/include/pybind11/cast.h
@@ -406,14 +406,14 @@ protected:
 
 template <> class type_caster<std::wstring> {
 public:
-	bool load(handle src, bool) {
-		object temp;
-		handle load_src = src;
-		if (!PyUnicode_Check(load_src.ptr())) {
-			temp = object(PyUnicode_FromObject(load_src.ptr()), false);
-			if (!temp) { PyErr_Clear(); return false; }
-			load_src = temp;
-		}
+    bool load(handle src, bool) {
+        object temp;
+        handle load_src = src;
+        if (!PyUnicode_Check(load_src.ptr())) {
+            temp = object(PyUnicode_FromObject(load_src.ptr()), false);
+            if (!temp) { PyErr_Clear(); return false; }
+            load_src = temp;
+        }
         wchar_t *buffer = nullptr;
         ssize_t length = -1;
 #if PY_MAJOR_VERSION >= 3
@@ -430,24 +430,24 @@ public:
         }
 #endif
         if (!buffer) { PyErr_Clear(); return false; }
-		value = std::wstring(buffer, length);
-		success = true;
-		return true;
-	}
+        value = std::wstring(buffer, length);
+        success = true;
+        return true;
+    }
 
-	static handle cast(const std::wstring &src, return_value_policy /* policy */, handle /* parent */) {
-		return PyUnicode_FromWideChar(src.c_str(), src.length());
-	}
+    static handle cast(const std::wstring &src, return_value_policy /* policy */, handle /* parent */) {
+        return PyUnicode_FromWideChar(src.c_str(), src.length());
+    }
 
-	PYBIND11_TYPE_CASTER(std::wstring, _(PYBIND11_STRING_NAME));
+    PYBIND11_TYPE_CASTER(std::wstring, _(PYBIND11_STRING_NAME));
 protected:
     bool success = false;
 };
 
 template <> class type_caster<char> : public type_caster<std::string> {
 public:
-	bool load(handle src, bool convert) {
-	    if (src.ptr() == Py_None) { return true; }
+    bool load(handle src, bool convert) {
+        if (src.ptr() == Py_None) { return true; }
         return type_caster<std::string>::load(src, convert);
     }
 
@@ -462,32 +462,32 @@ public:
     }
 
     operator char*() { return success ? (char *) value.c_str() : nullptr; }
-	operator char&() { return value[0]; }
+    operator char&() { return value[0]; }
 
     static PYBIND11_DESCR name() { return type_descr(_(PYBIND11_STRING_NAME)); }
 };
 
 template <> class type_caster<wchar_t> : public type_caster<std::wstring> {
 public:
-	bool load(handle src, bool convert) {
-	    if (src.ptr() == Py_None) { return true; }
+    bool load(handle src, bool convert) {
+        if (src.ptr() == Py_None) { return true; }
         return type_caster<std::wstring>::load(src, convert);
     }
 
-	static handle cast(const wchar_t *src, return_value_policy /* policy */, handle /* parent */) {
+    static handle cast(const wchar_t *src, return_value_policy /* policy */, handle /* parent */) {
         if (src == nullptr) return handle(Py_None).inc_ref();
-		return PyUnicode_FromWideChar(src, wcslen(src));
-	}
+        return PyUnicode_FromWideChar(src, wcslen(src));
+    }
 
-	static handle cast(wchar_t src, return_value_policy /* policy */, handle /* parent */) {
-		wchar_t wstr[2] = { src, L'\0' };
-		return PyUnicode_FromWideChar(wstr, 1);
-	}
+    static handle cast(wchar_t src, return_value_policy /* policy */, handle /* parent */) {
+        wchar_t wstr[2] = { src, L'\0' };
+        return PyUnicode_FromWideChar(wstr, 1);
+    }
 
     operator wchar_t*() { return success ? (wchar_t *) value.c_str() : nullptr; }
-	operator wchar_t&() { return value[0]; }
+    operator wchar_t&() { return value[0]; }
 
-	static PYBIND11_DESCR name() { return type_descr(_(PYBIND11_STRING_NAME)); }
+    static PYBIND11_DESCR name() { return type_descr(_(PYBIND11_STRING_NAME)); }
 };
 
 template <typename T1, typename T2> class type_caster<std::pair<T1, T2>> {