diff --git a/src/parser.cpp b/src/parser.cpp
index 1a74998..a951746 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -165,6 +165,7 @@ QString Parser::disassemble(std::weak_ptr<const Program> program, uint32_t instr
                 return QString("Invalid instruction");
         }
     }
+    return QString("Invalid instruction");
 }
 QString Parser::generateEcallString(uint32_t) const {
     return QString("ecall");