diff --git a/Changes.txt b/Changes.txt
index 46221134e..27e4bb6f5 100644
--- a/Changes.txt
+++ b/Changes.txt
@@ -25,13 +25,16 @@
      - delayed player 1 swap
      - stuffed player move
 
-  * disabled some developer options for 'Player settings'
+  * Disabled some developer options for 'Player settings'.
 
-  * Removed superfluous controller option 'PADDLES_IDIR'
+  * Removed superfluous controller option 'PADDLES_IDIR'.
 
-  * Fixed not working 7800 pause key
+  * Fixed not working 7800 pause key.
 
-  * Fixed 'Dancing Plate (Unknown) (PAL)' to use joystick
+  * Fixed display of negative values in debugger; sometimes they were
+    shown as positive.
+
+  * Fixed 'Dancing Plate (Unknown) (PAL)' to use joystick.
 
 -Have fun!
 
diff --git a/src/common/Base.cxx b/src/common/Base.cxx
index 91aae5cc8..a6a92649d 100644
--- a/src/common/Base.cxx
+++ b/src/common/Base.cxx
@@ -46,10 +46,10 @@ string Base::toString(int value, Common::Base::Format outputBase)
     }
 
     case Base::F_10:    // base 10: 3 or 5 bytes (depending on value)
-      if(value < 0x100)
-        std::snprintf(vToS_buf, 4, "%3d", value & 0xff);
+      if(value > -0x100 && value < 0x100)
+        std::snprintf(vToS_buf, 5, "%3d", Int16(value));
       else
-        std::snprintf(vToS_buf, 6, "%5d", value & 0xffff);
+        std::snprintf(vToS_buf, 6, "%5d", value);
       break;
 
     case Base::F_10_02:  // base 10: 2 digits (with leading zero)