diff --git a/libc/utils/tools/WrapperGen/Main.cpp b/libc/utils/tools/WrapperGen/Main.cpp
--- a/libc/utils/tools/WrapperGen/Main.cpp
+++ b/libc/utils/tools/WrapperGen/Main.cpp
@@ -47,6 +47,11 @@
   for (size_t i = 0; i < ArgsList.size(); ++i) {
     llvm::Record *ArgType = ArgsList[i]->getValueAsDef("ArgType");
     auto TypeName = Indexer.getTypeAsString(ArgType);
+
+    if (TypeName.compare("void") == 0) {
+      continue;
+    }
+
     OS << TypeName << " " << ArgPrefix << i;
     CallArgs << ArgPrefix << i;
     if (i < ArgsList.size() - 1) {