diff --git a/lib/CodeGen/PseudoSourceValue.cpp b/lib/CodeGen/PseudoSourceValue.cpp
index e95f017..7fb3e6e 100644
--- a/lib/CodeGen/PseudoSourceValue.cpp
+++ b/lib/CodeGen/PseudoSourceValue.cpp
@@ -109,3 +109,7 @@
   // Spill slots will not alias any LLVM IR value.
   return !MFI->isSpillSlotObjectIndex(FI);
 }
+
+void FixedStackPseudoSourceValue::printCustom(raw_ostream &OS) const {
+  OS << "FixedStack" << FI;
+}