diff --git a/command/sol_cmds.cpp b/command/sol_cmds.cpp
index 81dfc99..f8371fb 100644
--- a/command/sol_cmds.cpp
+++ b/command/sol_cmds.cpp
@@ -41,7 +41,7 @@
             request->packetSeqNum, request->packetAckSeqNum,
             request->acceptedCharCount, request->inOperation.ack, charData);
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         log<level::ERR>(e.what());
         return std::vector<uint8_t>();