diff --git a/shlr/zip/zlib/gzwrite.c b/shlr/zip/zlib/gzwrite.c
index aa767fbf63..583e4e81a5 100644
--- a/shlr/zip/zlib/gzwrite.c
+++ b/shlr/zip/zlib/gzwrite.c
@@ -489,7 +489,7 @@ int ZEXPORT gzflush(file, flush)
     }
 
     /* compress remaining data with requested flush */
-    gz_comp(state, flush);
+    (void)gz_comp(state, flush);
     return state->err;
 }