diff --git a/doc/index.html b/doc/index.html
index 077dcf2..4c4667b 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -252,7 +252,7 @@
 	<a href="#Mw_Vulkan_h__MwVulkanGetField">MwVulkanGetField</a>
 </dd>
 <dd>
-	<a href="#Mw_Vulkan_h__MwVulkanSupported__">MwVulkanSupported()</a>
+	<a href="#Mw_Vulkan_h__MwVulkanSupported">MwVulkanSupported</a>
 </dd>
 <dt>
 	<a href="#Mw_Window_h">Mw/Window.h</a>
@@ -1681,7 +1681,9 @@
 </dd>
 </dl>
 <hr>
-<pre id="Mw_Vulkan_h__MwVulkanSupported__"><code>MWDECL VkBool32 MwVulkanSupported();</code></pre>
+<pre id="Mw_Vulkan_h__MwVulkanSupported"><code>MWDECL VkBool32 MwVulkanSupported (
+	void
+);</code></pre>
 <dl>
 <dd>
 	Return whether Vulkan is installed on the target platform.
diff --git a/include/Mw/Vulkan.h b/include/Mw/Vulkan.h
index 8d6337b..57c7ba5 100644
--- a/include/Mw/Vulkan.h
+++ b/include/Mw/Vulkan.h
@@ -120,7 +120,7 @@ MWDECL void* MwVulkanGetField(MwWidget handle, MwVulkanField field, MwErrorEnum*
 /*!
  * %brief Return whether Vulkan is installed on the target platform.
  */
-MWDECL VkBool32 MwVulkanSupported();
+MWDECL VkBool32 MwVulkanSupported(void);
 
 #ifdef __cplusplus
 }
diff --git a/src/widget/vulkan.c b/src/widget/vulkan.c
index 5ad4000..971bec8 100644
--- a/src/widget/vulkan.c
+++ b/src/widget/vulkan.c
@@ -485,7 +485,7 @@ void* MwVulkanGetField(MwWidget handle, MwVulkanField field, MwErrorEnum* out) {
 	}
 };
 
-VkBool32 MwVulkanSupported() {
+VkBool32 MwVulkanSupported(void) {
 	if(vulkan_supported == VULKAN_SUPPORTED_UNKNOWN) {
 		LIB_TYPE lib = vulkan_lib_load();
 		if(lib == NULL) {