diff --git a/src/zfile.c b/src/zfile.c
index 52259a3..1f54aa5 100644
--- a/src/zfile.c
+++ b/src/zfile.c
@@ -224,10 +224,10 @@ static char *try_uncompress_with_gzip(const char *name)
     do {
         char buf[256];
 
-        len = gzread(fdsrc, (void *)buf, 256);
+        len = gzread((gzFile)fdsrc, (void *)buf, 256);
         if (len > 0) {
             if (fwrite((void *)buf, 1, (size_t)len, fddest) < len) {
-                gzclose(fdsrc);
+                gzclose((gzFile)fdsrc);
                 fclose(fddest);
                 ioutil_remove(tmp_name);
                 lib_free(tmp_name);
@@ -236,7 +236,7 @@ static char *try_uncompress_with_gzip(const char *name)
         }
     } while (len > 0);
 
-    gzclose(fdsrc);
+    gzclose((gzFile)fdsrc);
     fclose(fddest);
 
     return tmp_name;
@@ -830,11 +830,11 @@ static int compress_with_gzip(const char *src, const char *dest)
         char buf[256];
         len = fread((void *)buf, 256, 1, fdsrc);
         if (len > 0) {
-            gzwrite(fddest, (void *)buf, (unsigned int)len);
+            gzwrite((gzFile)fddest, (void *)buf, (unsigned int)len);
         }
     } while (len > 0);
 
-    gzclose(fddest);
+    gzclose((gzFile)fddest);
     fclose(fdsrc);
 
     ZDEBUG(("compress with zlib: OK."));