diff --git a/src/gfxstream/codegen/scripts/cereal/extensionstructs.py b/src/gfxstream/codegen/scripts/cereal/extensionstructs.py
index caa4ea19ea8..0234805fb1c 100644
--- a/src/gfxstream/codegen/scripts/cereal/extensionstructs.py
+++ b/src/gfxstream/codegen/scripts/cereal/extensionstructs.py
@@ -100,7 +100,7 @@ class VulkanExtensionStructs(VulkanWrapperGenerator):
             # NOTE: No need for %% if no substitution is made.
             cgen.stmt("fprintf(stderr, \"Unhandled Vulkan structure type %s [%d], aborting.\\n\", string_VkStructureType(VkStructureType(structType)), structType)")
             cgen.stmt("GFXSTREAM_ABORT(::emugl::FatalError(::emugl::ABORT_REASON_OTHER))")
-            cgen.stmt("return (%s)0" % self.extensionStructSizeRetType.typeName)
+            cgen.stmt("return static_cast<%s>(0)" % self.extensionStructSizeRetType.typeName)
 
         self.module.appendImpl(
             self.codegen.makeFuncImpl(