diff --git a/llvm/lib/Target/PowerPC/PPC32AsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPC32AsmPrinter.cpp
index 9a591a17c4b7..501f8bb8fb89 100644
--- a/llvm/lib/Target/PowerPC/PPC32AsmPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/PPC32AsmPrinter.cpp
@@ -45,7 +45,7 @@ namespace {
 
     PPC32AsmPrinter(std::ostream &O, TargetMachine &TM)
       : AsmPrinter(O, TM), LabelNumber(0) {
-      UsesUnderscorePrefix = 1;
+      GlobalPrefix = "_";
     }
 
     /// Unique incrementer for label values for referencing Global values.
diff --git a/llvm/lib/Target/PowerPC/PPC64AsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPC64AsmPrinter.cpp
index d32f1982310a..0e694ea47eb3 100644
--- a/llvm/lib/Target/PowerPC/PPC64AsmPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/PPC64AsmPrinter.cpp
@@ -666,7 +666,7 @@ bool Printer::doInitialization(Module &M) {
     O << '\n';
   }
 
-  Mang = new Mangler(M, true);
+  Mang = new Mangler(M, "_");
   return false; // success
 }