2 files changed, 4 insertions, 0 deletions
diff --git a/deflate.c b/deflate.c
index 0345980..a578b1a 100644
--- a/deflate.c
+++ b/deflate.c
@@ -279,6 +279,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
    if (windowBits < 0) { /* suppress zlib wrapper */
        wrap = 0;
+        if (windowBits < -15)
+            return Z_STREAM_ERROR;
        windowBits = -windowBits;
    }
 #ifdef GZIP
diff --git a/inflate.c b/inflate.c
index 2a3c4fe..8acbef4 100644
--- a/inflate.c
+++ b/inflate.c
@@ -168,6 +168,8 @@ int windowBits;
    /* extract wrap request from windowBits parameter */
    if (windowBits < 0) {
+        if (windowBits < -15)
+            return Z_STREAM_ERROR;
        wrap = 0;
        windowBits = -windowBits;
    }