diff --git a/m4/check-zlib.m4 b/m4/check-zlib.m4
index bdf9a456f..2dc44246d 100644
--- a/m4/check-zlib.m4
+++ b/m4/check-zlib.m4
@@ -20,7 +20,6 @@ else
   AC_MSG_RESULT(no)
 fi])
 
-ZLIB_HOME=/usr/local
 if test ! -f "${ZLIB_HOME}/include/zlib.h"
 then
         ZLIB_HOME=/usr