diff --git a/src/arch/sparc/isa/formats/basic.isa b/src/arch/sparc/isa/formats/basic.isa
index db77b1a15..042201de4 100644
--- a/src/arch/sparc/isa/formats/basic.isa
+++ b/src/arch/sparc/isa/formats/basic.isa
@@ -33,6 +33,14 @@ def template BasicExecDeclare {{
         Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const;
 }};
 
+// Definitions of execute methods that panic.
+def template BasicExecPanic {{
+        Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const
+        {
+            panic("Execute method called when it shouldn't!");
+        }
+}};
+
 // Basic instruction class declaration template.
 def template BasicDeclare {{
         /**
diff --git a/src/arch/sparc/isa/formats/micro.isa b/src/arch/sparc/isa/formats/micro.isa
index 867179cfd..320603a6a 100644
--- a/src/arch/sparc/isa/formats/micro.isa
+++ b/src/arch/sparc/isa/formats/micro.isa
@@ -59,6 +59,8 @@ output header {{
                 assert(microPC < numMicroOps);
                 return microOps[microPC];
             }
+
+            %(BasicExecPanic)s
         };
 
         class SparcMicroInst : public SparcStaticInst