diff --git a/source/blender/python/intern/bpy_interface.c b/source/blender/python/intern/bpy_interface.c
index 7b0daa91523..cd4d2f7a1c2 100644
--- a/source/blender/python/intern/bpy_interface.c
+++ b/source/blender/python/intern/bpy_interface.c
@@ -530,7 +530,8 @@ static bool python_script_exec(
 
 	if (py_dict) {
 #ifdef PYMODULE_CLEAR_WORKAROUND
-		PyModuleObject *mmod = (PyModuleObject *)PyDict_GetItemString(PyThreadState_GET()->interp->modules, "__main__");
+		PyModuleObject *mmod = (PyModuleObject *)PyDict_GetItem(
+		        PyThreadState_GET()->interp->modules, bpy_intern_str___main__);
 		PyObject *dict_back = mmod->md_dict;
 		/* freeing the module will clear the namespace,
 		 * gives problems running classes defined in this namespace being used later. */
diff --git a/source/blender/python/intern/bpy_intern_string.c b/source/blender/python/intern/bpy_intern_string.c
index ac0100fa75d..e9d84b2099b 100644
--- a/source/blender/python/intern/bpy_intern_string.c
+++ b/source/blender/python/intern/bpy_intern_string.c
@@ -34,21 +34,23 @@
 
 #include "BLI_utildefines.h"
 
-static PyObject *bpy_intern_str_arr[13];
+static PyObject *bpy_intern_str_arr[15];
 
-PyObject *bpy_intern_str_register;
-PyObject *bpy_intern_str_unregister;
-PyObject *bpy_intern_str_bl_rna;
-PyObject *bpy_intern_str_bl_property;
-PyObject *bpy_intern_str_bpy_types;
-PyObject *bpy_intern_str_order;
-PyObject *bpy_intern_str_attr;
-PyObject *bpy_intern_str_self;
-PyObject *bpy_intern_str_frame;
-PyObject *bpy_intern_str___slots__;
-PyObject *bpy_intern_str___name__;
 PyObject *bpy_intern_str___doc__;
+PyObject *bpy_intern_str___main__;
 PyObject *bpy_intern_str___module__;
+PyObject *bpy_intern_str___name__;
+PyObject *bpy_intern_str___slots__;
+PyObject *bpy_intern_str_attr;
+PyObject *bpy_intern_str_bl_property;
+PyObject *bpy_intern_str_bl_rna;
+PyObject *bpy_intern_str_bpy_types;
+PyObject *bpy_intern_str_frame;
+PyObject *bpy_intern_str_order;
+PyObject *bpy_intern_str_properties;
+PyObject *bpy_intern_str_register;
+PyObject *bpy_intern_str_self;
+PyObject *bpy_intern_str_unregister;
 
 void bpy_intern_string_init(void)
 {
@@ -57,19 +59,21 @@ void bpy_intern_string_init(void)
 #define BPY_INTERN_STR(var, str) \
 	{ var = bpy_intern_str_arr[i++] = PyUnicode_FromString(str); } (void)0
 
-	BPY_INTERN_STR(bpy_intern_str_register, "register");
-	BPY_INTERN_STR(bpy_intern_str_unregister, "unregister");
-	BPY_INTERN_STR(bpy_intern_str_bl_rna, "bl_rna");
-	BPY_INTERN_STR(bpy_intern_str_bl_property, "bl_property");
-	BPY_INTERN_STR(bpy_intern_str_bpy_types, "bpy.types");
-	BPY_INTERN_STR(bpy_intern_str_order, "order");
-	BPY_INTERN_STR(bpy_intern_str_attr, "attr");
-	BPY_INTERN_STR(bpy_intern_str_self, "self");
-	BPY_INTERN_STR(bpy_intern_str_frame, "frame");
-	BPY_INTERN_STR(bpy_intern_str___slots__, "__slots__");
-	BPY_INTERN_STR(bpy_intern_str___name__, "__name__");
 	BPY_INTERN_STR(bpy_intern_str___doc__, "__doc__");
+	BPY_INTERN_STR(bpy_intern_str___main__, "__main__");
 	BPY_INTERN_STR(bpy_intern_str___module__, "__module__");
+	BPY_INTERN_STR(bpy_intern_str___name__, "__name__");
+	BPY_INTERN_STR(bpy_intern_str___slots__, "__slots__");
+	BPY_INTERN_STR(bpy_intern_str_attr, "attr");
+	BPY_INTERN_STR(bpy_intern_str_bl_property, "bl_property");
+	BPY_INTERN_STR(bpy_intern_str_bl_rna, "bl_rna");
+	BPY_INTERN_STR(bpy_intern_str_bpy_types, "bpy.types");
+	BPY_INTERN_STR(bpy_intern_str_frame, "frame");
+	BPY_INTERN_STR(bpy_intern_str_order, "order");
+	BPY_INTERN_STR(bpy_intern_str_properties, "properties");
+	BPY_INTERN_STR(bpy_intern_str_register, "register");
+	BPY_INTERN_STR(bpy_intern_str_self, "self");
+	BPY_INTERN_STR(bpy_intern_str_unregister, "unregister");
 
 #undef BPY_INTERN_STR
 
diff --git a/source/blender/python/intern/bpy_intern_string.h b/source/blender/python/intern/bpy_intern_string.h
index 394e84d89bd..66c469f70bc 100644
--- a/source/blender/python/intern/bpy_intern_string.h
+++ b/source/blender/python/intern/bpy_intern_string.h
@@ -30,18 +30,20 @@
 void bpy_intern_string_init(void);
 void bpy_intern_string_exit(void);
 
-extern PyObject *bpy_intern_str_register;
-extern PyObject *bpy_intern_str_unregister;
-extern PyObject *bpy_intern_str_bl_rna;
-extern PyObject *bpy_intern_str_bl_property;
-extern PyObject *bpy_intern_str_bpy_types;
-extern PyObject *bpy_intern_str_order;
-extern PyObject *bpy_intern_str_attr;
-extern PyObject *bpy_intern_str_self;
-extern PyObject *bpy_intern_str_frame;
-extern PyObject *bpy_intern_str___slots__;
-extern PyObject *bpy_intern_str___name__;
 extern PyObject *bpy_intern_str___doc__;
+extern PyObject *bpy_intern_str___main__;
 extern PyObject *bpy_intern_str___module__;
+extern PyObject *bpy_intern_str___name__;
+extern PyObject *bpy_intern_str___slots__;
+extern PyObject *bpy_intern_str_attr;
+extern PyObject *bpy_intern_str_bl_property;
+extern PyObject *bpy_intern_str_bl_rna;
+extern PyObject *bpy_intern_str_bpy_types;
+extern PyObject *bpy_intern_str_frame;
+extern PyObject *bpy_intern_str_order;
+extern PyObject *bpy_intern_str_properties;
+extern PyObject *bpy_intern_str_register;
+extern PyObject *bpy_intern_str_self;
+extern PyObject *bpy_intern_str_unregister;
 
 #endif  /* __BPY_INTERN_STRING_H__ */
diff --git a/source/blender/python/intern/bpy_rna.c b/source/blender/python/intern/bpy_rna.c
index 3c0a5d6dd9a..6f3d0145d87 100644
--- a/source/blender/python/intern/bpy_rna.c
+++ b/source/blender/python/intern/bpy_rna.c
@@ -1842,7 +1842,7 @@ static int pyrna_py_to_prop(
 				    (BPy_StructRNA_Check(value)) &&
 				    (RNA_struct_is_a(((BPy_StructRNA *)value)->ptr.type, &RNA_Operator)))
 				{
-					value = PyObject_GetAttrString(value, "properties");
+					value = PyObject_GetAttr(value, bpy_intern_str_properties);
 					value_new = value;
 				}