diff --git a/src/arch/sparc/isa/decoder.isa b/src/arch/sparc/isa/decoder.isa
index 6c97ca76c..2ce700ef1 100644
--- a/src/arch/sparc/isa/decoder.isa
+++ b/src/arch/sparc/isa/decoder.isa
@@ -1009,7 +1009,6 @@ decode OP default Unknown::unknown()
                 0x80: Trap::shutdown({{fault = new IllegalInstruction;}});
                 0x81: FailUnimpl::siam();
             }
-#if FULL_SYSTEM
             // M5 special opcodes use the reserved IMPDEP2A opcode space
             0x37: decode M5FUNC {
 #if FULL_SYSTEM
@@ -1022,9 +1021,6 @@ decode OP default Unknown::unknown()
 #endif
                 default: Trap::impdep2({{fault = new IllegalInstruction;}});
             }
-#else
-            0x37: Trap::impdep2({{fault = new IllegalInstruction;}});
-#endif
             0x38: Branch::jmpl({{
                 Addr target = Rs1 + Rs2_or_imm13;
                 if(target & 0x3)