diff --git a/services/input/InputReader.h b/services/input/InputReader.h
index 98daaf5d8a540..a8bb63671b609 100644
--- a/services/input/InputReader.h
+++ b/services/input/InputReader.h
@@ -1285,6 +1285,9 @@ protected:
             if (haveSizeBias) {
                 *outSize += sizeBias;
             }
+            if (*outSize < 0) {
+                *outSize = 0;
+            }
         }
     } mCalibration;