diff --git a/contrib/vstudio/vc10/zlibvc.def b/contrib/vstudio/vc10/zlibvc.def
index f0bf035..18ddf50 100644
--- a/contrib/vstudio/vc10/zlibvc.def
+++ b/contrib/vstudio/vc10/zlibvc.def
@@ -132,7 +132,6 @@ EXPORTS
 
 ; zlib1 v1.2.6 added:
         gzgetc_                                 @161
-        gzflags                                 @162
         inflateResetKeep                        @163
         deflateResetKeep                        @164
 
diff --git a/contrib/vstudio/vc9/zlibvc.def b/contrib/vstudio/vc9/zlibvc.def
index 03a45dc..2df8bb3 100644
--- a/contrib/vstudio/vc9/zlibvc.def
+++ b/contrib/vstudio/vc9/zlibvc.def
@@ -132,7 +132,6 @@ EXPORTS
 
 ; zlib1 v1.2.6 added:
         gzgetc_                                 @161
-        gzflags                                 @162
         inflateResetKeep                        @163
         deflateResetKeep                        @164