diff --git a/contrib/vstudio/vc10/zlibvc.def b/contrib/vstudio/vc10/zlibvc.def
index 6bc1e60..571b0a6 100644
--- a/contrib/vstudio/vc10/zlibvc.def
+++ b/contrib/vstudio/vc10/zlibvc.def
@@ -131,7 +131,7 @@ EXPORTS
         inflateUndermine                        @160
 
 ; zlib1 v1.2.6 added:
-        gzgetc_                                 @30
+        gzgetc_                                 @161
         gzflags                                 @162
         inflateResetKeep                        @163
 	deflateResetKeep			@164
diff --git a/contrib/vstudio/vc9/zlibvc.def b/contrib/vstudio/vc9/zlibvc.def
index 6bc1e60..571b0a6 100644
--- a/contrib/vstudio/vc9/zlibvc.def
+++ b/contrib/vstudio/vc9/zlibvc.def
@@ -131,7 +131,7 @@ EXPORTS
         inflateUndermine                        @160
 
 ; zlib1 v1.2.6 added:
-        gzgetc_                                 @30
+        gzgetc_                                 @161
         gzflags                                 @162
         inflateResetKeep                        @163
 	deflateResetKeep			@164