diff --git a/libgo/godumpspec/godumpspec.cpp b/libgo/godumpspec/godumpspec.cpp
index 8a88fba..c802ac1 100644
--- a/libgo/godumpspec/godumpspec.cpp
+++ b/libgo/godumpspec/godumpspec.cpp
@@ -1101,10 +1101,13 @@
     case dwarf::DW_TAG_volatile_type: {
       // Throw away these qualifiers.
       DWARFDie qtyp = die.getAttributeValueAsReferencedDie(dwarf::DW_AT_type);
-      assert(qtyp.isValid());
-      rval = generateType(qtyp);
-      setTypeAlign(die, typeAlign(qtyp));
-      setTypeSize(die, typeSize(qtyp));
+      if (!qtyp.isValid()) {
+        rval = false;
+      } else {
+        rval = generateType(qtyp);
+        setTypeAlign(die, typeAlign(qtyp));
+        setTypeSize(die, typeSize(qtyp));
+      }
       break;
     }
     default: