diff --git a/test/tools/ossfuzz/SolidityGenerator.cpp b/test/tools/ossfuzz/SolidityGenerator.cpp
index 0c5a55322..65a66c291 100644
--- a/test/tools/ossfuzz/SolidityGenerator.cpp
+++ b/test/tools/ossfuzz/SolidityGenerator.cpp
@@ -228,7 +228,7 @@ string FunctionGenerator::visit()
 	string name = state->newFunction();
 	state->updateFunction(name);
 	if (!m_freeFunction)
-		visibility = "public";
+		visibility = "external";
 
 	auto inputType = TypeGenerator{state}.type();
 	state->currentFunctionState()->addInput(pair<string, shared_ptr<SolidityType>>("i1", inputType));
diff --git a/test/tools/ossfuzz/SolidityGenerator.h b/test/tools/ossfuzz/SolidityGenerator.h
index d0a8d3904..34703f0ab 100644
--- a/test/tools/ossfuzz/SolidityGenerator.h
+++ b/test/tools/ossfuzz/SolidityGenerator.h
@@ -298,9 +298,9 @@ struct FunctionType: SolidityType
 
 		std::string retString = std::string("function ") + "(" + typeString(inputs) + ")";
 		if (outputs.empty())
-			return retString + " public pure";
+			return retString + " external pure";
 		else
-			return retString + " public pure returns (" + typeString(outputs) +	")";
+			return retString + " external pure returns (" + typeString(outputs) +	")";
 	}
 
 	std::vector<std::shared_ptr<SolidityType>> inputs;