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-rw-r--r--ext/zlib/zlib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index db2ba0d296..38ab667cd4 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -1850,7 +1850,7 @@ gzfile_get32(src)
n = *(src++) & 0xff;
n |= (*(src++) & 0xff) << 8;
n |= (*(src++) & 0xff) << 16;
- n |= (*(src++) & 0xff) << 24;
+ n |= (*(src++) & 0xffU) << 24;
return n;
}