diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 3ab03e988e6..195a4f71ec6 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -218,8 +218,9 @@ std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
     }
     if (MTy->isVarArg()) {
       if (!MTy->getParamTypes().empty()) 
-    	FunctionInards << ", ";
-      FunctionInards << "...";
+    	FunctionInards << ", ...";
+    } else if (MTy->getParamTypes().empty()) {
+      FunctionInards << "void";
     }
     FunctionInards << ")";
     std::string tstr = FunctionInards.str();
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index 3ab03e988e6..195a4f71ec6 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -218,8 +218,9 @@ std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
     }
     if (MTy->isVarArg()) {
       if (!MTy->getParamTypes().empty()) 
-    	FunctionInards << ", ";
-      FunctionInards << "...";
+    	FunctionInards << ", ...";
+    } else if (MTy->getParamTypes().empty()) {
+      FunctionInards << "void";
     }
     FunctionInards << ")";
     std::string tstr = FunctionInards.str();