diff --git a/src/win32/win_snd.c b/src/win32/win_snd.c
index c030eec5c..bc04bd6df 100644
--- a/src/win32/win_snd.c
+++ b/src/win32/win_snd.c
@@ -34,6 +34,7 @@
 #define _FILE_OFFSET_BITS 0
 #endif
 
+#ifdef HAVE_ZLIB
 #include "zlib.h"
 #endif
 #endif