diff --git a/src/vmhandler.cpp b/src/vmhandler.cpp
index 0fec67c..0d67547 100644
--- a/src/vmhandler.cpp
+++ b/src/vmhandler.cpp
@@ -286,7 +286,8 @@ namespace vm
                 // the register is determined by the vm handler fetch above...
                 auto handler_transform =
                     std::find_if( handler_fetch, vm_entry.end(), [ & ]( const zydis_instr_t &instr_data ) -> bool {
-                        return instr_data.instr.operands[ 0 ].reg.value ==
+                        return vm::transform::valid( instr_data.instr.mnemonic ) &&
+                               instr_data.instr.operands[ 0 ].reg.value ==
                                    handler_fetch->instr.operands[ 0 ].reg.value &&
                                instr_data.instr.operands[ 0 ].actions & ZYDIS_OPERAND_ACTION_WRITE;
                     } );