diff --git a/ethereum/blockcreation/src/main/java/tech/pegasys/pantheon/ethereum/blockcreation/BlockMiner.java b/ethereum/blockcreation/src/main/java/tech/pegasys/pantheon/ethereum/blockcreation/BlockMiner.java
index 7cbb932172..73afd52df2 100644
--- a/ethereum/blockcreation/src/main/java/tech/pegasys/pantheon/ethereum/blockcreation/BlockMiner.java
+++ b/ethereum/blockcreation/src/main/java/tech/pegasys/pantheon/ethereum/blockcreation/BlockMiner.java
@@ -73,9 +73,9 @@ public class BlockMiner<C, M extends AbstractBlockCreator<C>> implements Runnabl
         LOG.info("Block creation process cancelled.");
         break;
       } catch (final InterruptedException ex) {
-        LOG.error("Block mining was interrupted {}", ex);
+        LOG.error("Block mining was interrupted.", ex);
       } catch (final Exception ex) {
-        LOG.error("Blocking mining threw an exception {}", ex);
+        LOG.error("Block mining threw an unhandled exception.", ex);
       }
     }
   }