diff --git a/src/canonmn_int.cpp b/src/canonmn_int.cpp
index 01db3baf04..e0aac23576 100644
--- a/src/canonmn_int.cpp
+++ b/src/canonmn_int.cpp
@@ -2893,7 +2893,7 @@ float string_to_float(std::string const& str) {
   ss >> val;
 
   if (ss.fail()) {
-    throw Error(ErrorCode::kerErrorMessage, std::string("canonmn_int.cpp:string_to_float failed for: ") + str);
+    throw Error(ErrorCode::kerErrorMessage, "canonmn_int.cpp:string_to_float failed for: ", str);
   }
 
   return val;
diff --git a/src/sonymn_int.cpp b/src/sonymn_int.cpp
index 99a3ccae4e..07e09cb7a5 100644
--- a/src/sonymn_int.cpp
+++ b/src/sonymn_int.cpp
@@ -1332,8 +1332,7 @@ static void findLensSpecFlags(const Value& value, std::string& flagsStart, std::
       }
       // Should never get in here. LensSpecFlags.mask should contain all the
       // bits in all the LensSpecFlags.flags.val_ entries
-      throw Error(ErrorCode::kerErrorMessage,
-                  std::string("LensSpecFlags mask doesn't match the bits in the flags array"));
+      throw Error(ErrorCode::kerErrorMessage, "LensSpecFlags mask doesn't match the bits in the flags array");
     }
   }
 }