diff --git a/wire/modules/Fieldtype/FieldtypeModule.module b/wire/modules/Fieldtype/FieldtypeModule.module
index 4a35e022..3251e210 100644
--- a/wire/modules/Fieldtype/FieldtypeModule.module
+++ b/wire/modules/Fieldtype/FieldtypeModule.module
@@ -8,7 +8,7 @@
  * For documentation about the fields used in this class, please see:  
  * /wire/core/Fieldtype.php
  * 
- * ProcessWire 3.x, Copyright 2016 by Ryan Cramer
+ * ProcessWire 3.x, Copyright 2021 by Ryan Cramer
  * https://processwire.com
  *
  */
@@ -21,7 +21,7 @@ class FieldtypeModule extends Fieldtype {
 			'version' => 101,
 			'summary' => 'Field that stores a reference to another module',
 			'permanent' => true, 
-			);
+		);
 	}
 
 	public function getBlankValue(Page $page, Field $field) {
@@ -51,8 +51,9 @@ class FieldtypeModule extends Fieldtype {
 
 	public function ___wakeupValue(Page $page, Field $field, $value) {
 		if(empty($value)) return $this->getBlankValue($page, $field);
-		if($field->get('instantiateModule')) return $this->wire('modules')->get($value); 
-		return $this->wire('modules')->getModuleClass((int) $value); 
+		$modules = $this->wire()->modules;
+		if($field->get('instantiateModule')) return $modules->get($value); 
+		return $modules->getModuleClass((int) $value); 
 	}
 
 	public function ___sleepValue(Page $page, Field $field, $value) {
@@ -66,15 +67,14 @@ class FieldtypeModule extends Fieldtype {
 
 	public function getInputfield(Page $page, Field $field) {
 	
-		/** @var Modules $modules */
-		$modules = $this->wire('modules');
+		$modules = $this->wire()->modules;
 
 		$inputfieldClass = $field->get('inputfieldClass');
 		$inputfieldClass = $inputfieldClass ? $inputfieldClass : 'InputfieldSelect';
 		
 		/** @var InputfieldSelect $inputfield */
 		$inputfield = $modules->get($inputfieldClass); 
-		if(!$inputfield) $inputfield = $this->modules->get('InputfieldSelect'); 
+		if(!$inputfield) $inputfield = $modules->get('InputfieldSelect'); 
 
 		$inputfield->attr('name', $field->name); 
 		$inputfield->class = $this->className();
@@ -82,7 +82,7 @@ class FieldtypeModule extends Fieldtype {
 
 		foreach($modules as $module) {
 			$found = false; 
-			$ns = $this->modules->getModuleNamespace($module);
+			$ns = $modules->getModuleNamespace($module);
 			$parents = wireClassParents($ns ? "$ns$module" : "$module"); 
 			$moduleTypes = $field->get('moduleTypes');
 			if($moduleTypes) foreach($moduleTypes as $moduleType) {
@@ -99,7 +99,13 @@ class FieldtypeModule extends Fieldtype {
 			} else if($labelField === 'title-summary') {
 				$info = $modules->getModuleInfoVerbose($module);
 				$label = !empty($info['title']) ? $info['title'] : (string) $module;
-				if(!empty($info['summary'])) $label .= " [span.detail] • " . $info['summary'] . ' [/span]';
+				if(!empty($info['summary'])) {
+					if($inputfieldClass === 'InputfieldRadios') {
+						$label .= " [span.detail] • $info[summary] [/span]";
+					} else {
+						$label .= " • $info[summary]";
+					}
+				}
 			} else {
 				$label = (string) $module; 
 			}
@@ -128,14 +134,15 @@ class FieldtypeModule extends Fieldtype {
 
 	public function ___getConfigInputfields(Field $field) {
 
+		$modules = $this->wire()->modules;
 		$inputfields = parent::___getConfigInputfields($field); 
 		$lastType = '';
 
 		/** @var InputfieldCheckboxes $f */
-		$f = $this->modules->get("InputfieldCheckboxes"); 
+		$f = $modules->get("InputfieldCheckboxes"); 
 		$f->attr('name', 'moduleTypes'); 
 		
-		foreach($this->modules as $module) {
+		foreach($modules as $module) {
 			if(strpos($module->className(), 'AdminTheme') === 0) {
 				$matches = array('', 'AdminTheme');
 			} else {
@@ -156,7 +163,7 @@ class FieldtypeModule extends Fieldtype {
 		$inputfields->append($f); 
 
 		/** @var InputfieldCheckbox $f */
-		$f = $this->modules->get("InputfieldCheckbox"); 
+		$f = $modules->get("InputfieldCheckbox"); 
 		$f->attr('name', 'instantiateModule'); 
 		$f->label = $this->_('Make this field an instance of the selected module?'); 
 		$f->description = $this->_('If checked, the field value will be an actual instance of the selected module. If not checked, the field value will be a string containing the class name of the module.'); // instantiate module description
@@ -164,7 +171,7 @@ class FieldtypeModule extends Fieldtype {
 		$inputfields->add($f); 
 
 		/** @var InputfieldRadios $f */
-		$f = $this->modules->get('InputfieldRadios'); 
+		$f = $modules->get('InputfieldRadios'); 
 		$f->label = $this->_('Options Label'); 
 		$f->attr('name', 'labelField'); 
 		$f->addOption('', $this->_('Name')); 
@@ -175,7 +182,7 @@ class FieldtypeModule extends Fieldtype {
 		$inputfields->add($f);
 
 		/** @var InputfieldRadios $f */
-		$f = $this->modules->get('InputfieldRadios'); 
+		$f = $modules->get('InputfieldRadios'); 
 		$f->label = $this->_('Input Type'); 
 		$f->attr('name', 'inputfieldClass'); 
 		$f->addOption('', $this->_('Select')); 
@@ -185,7 +192,7 @@ class FieldtypeModule extends Fieldtype {
 		$inputfields->add($f); 
 	
 		/** @var InputfieldCheckbox $f */
-		$f = $this->modules->get('InputfieldCheckbox');
+		$f = $modules->get('InputfieldCheckbox');
 		$f->label = $this->_('Show a “None” option?');
 		$f->attr('name', 'showNoneOption');
 		if($field->get('showNoneOption')) $f->attr('checked', 'checked'); 
@@ -193,14 +200,16 @@ class FieldtypeModule extends Fieldtype {
 		$inputfields->add($f);
 	
 		/** @var InputfieldRadios $f */
-		$f = $this->modules->get('InputfieldRadios');
+		$f = $modules->get('InputfieldRadios');
 		$f->attr('name', 'blankType');
 		$f->label = $this->_('Blank value type');
 		$f->addOption('null', 'Null');
 		$f->addOption('zero', 'Integer 0');
 		$f->addOption('false', 'Boolean false');
 		$f->addOption('placeholder', 'ModulePlaceholder instance');
-		$f->attr('value', $field->get('blankType')); 
+		$value = $field->get('blankType');
+		if($value === null) $value = 'null';
+		$f->val($value);
 		$inputfields->add($f);
 
 		return $inputfields; 			
@@ -208,7 +217,7 @@ class FieldtypeModule extends Fieldtype {
 
 	public function ___getCompatibleFieldtypes(Field $field) {
 		$fieldtypes = $this->wire(new Fieldtypes());
-		foreach($this->wire('fieldtypes') as $fieldtype) {
+		foreach($this->wire()->fieldtypes as $fieldtype) {
 			if($fieldtype instanceof FieldtypeModule) $fieldtypes->add($fieldtype);
 		}
 		return $fieldtypes;