diff --git a/renderdoc/driver/metal/metal_manager.h b/renderdoc/driver/metal/metal_manager.h
index 052d2823a..e26a0b3b0 100644
--- a/renderdoc/driver/metal/metal_manager.h
+++ b/renderdoc/driver/metal/metal_manager.h
@@ -33,18 +33,18 @@ struct MetalInitialContents
   {
     RDCCOMPILE_ASSERT(std::is_standard_layout<MetalInitialContents>::value,
                       "MetalInitialContents must be POD");
-    memset(this, 0, sizeof(*this));
+    memset((void *)this, 0, sizeof(*this));
   }
 
   MetalInitialContents(MetalResourceType t)
   {
-    memset(this, 0, sizeof(*this));
+    memset((void *)this, 0, sizeof(*this));
     type = t;
   }
 
   MetalInitialContents(MetalResourceType t, bytebuf data)
   {
-    memset(this, 0, sizeof(*this));
+    memset((void *)this, 0, sizeof(*this));
     type = t;
     resourceContents = data;
   }