diff --git a/deps/rzlib/gzguts.h b/deps/rzlib/gzguts.h
index 1fc2caa357..efe5adb9ed 100644
--- a/deps/rzlib/gzguts.h
+++ b/deps/rzlib/gzguts.h
@@ -164,12 +164,14 @@
 #define MODE_COPY 1      /* copy input directly */
 #define MODE_GZIP 2      /* decompress a gzip stream */
 
+#ifdef __APPLE__
 struct gzFile_s
 {
     unsigned have;
     unsigned char *next;
     z_off64_t pos;
 };
+#endif
 
 /* internal gzip file state data structure */
 typedef struct {