diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index 173f28c..277a0b0 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -2008,8 +2008,8 @@
   else for (unsigned i = getNumWords(); i > 0; i--) {
     cerr << pVal[i-1] << " ";
   }
-  cerr << " U(" << this->toString(10) << ") S(" << this->toStringSigned(10)
-       << ")\n" << std::setbase(10);
+  cerr << " U(" << this->toStringUnsigned(10) << ") S("
+       << this->toStringSigned(10) << ")\n" << std::setbase(10);
 }
 #endif