diff --git a/src/ADCSensor.cpp b/src/ADCSensor.cpp
index c94f251..2141ac4 100644
--- a/src/ADCSensor.cpp
+++ b/src/ADCSensor.cpp
@@ -165,7 +165,7 @@
             }
             errCount = 0;
         }
-        catch (std::invalid_argument)
+        catch (std::invalid_argument&)
         {
             errCount++;
         }