1 files changed, 2 insertions, 1 deletions
diff --git a/src/arch/x86/isa/formats/string.isa b/src/arch/x86/isa/formats/string.isa
index 5a386e3cd..20de5952e 100644
--- a/src/arch/x86/isa/formats/string.isa
+++ b/src/arch/x86/isa/formats/string.isa
@@ -85,7 +85,8 @@ def format StringInst(*opTypeSet) {{
             %s
         } else if (LEGACY_REPNE) {
             // The repne prefix is illegal
-            return new MicroFault(machInst, "illprefix", new InvalidOpcode, 0);
+            return new MicroFault(machInst, "illprefix", 0,
+                                  new InvalidOpcode, 0);
         } else {
             %s
         }