1 files changed, 1 insertions, 1 deletions

diff --git a/inflate.c b/inflate.c
index a718416..72e8438 100644
--- a/inflate.c
+++ b/inflate.c
@@ -243,7 +243,7 @@ int value;
     }
     if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
     value &= (1L << bits) - 1;
-    state->hold += value << state->bits;
+    state->hold += (unsigned)value << state->bits;
     state->bits += bits;
     return Z_OK;
 }