diff --git a/src/win32/ffi.rs b/src/win32/ffi.rs
index 7f060646..6bf0e2df 100644
--- a/src/win32/ffi.rs
+++ b/src/win32/ffi.rs
@@ -722,9 +722,6 @@ extern "system" {
     //
     pub fn glFlush();
 
-    // 
-    pub fn glViewport(x: libc::c_int, y: libc::c_int, w: libc::c_int, h: libc::c_int);
-
     // http://msdn.microsoft.com/en-us/library/windows/desktop/ms684175(v=vs.85).aspx
     pub fn LoadLibraryW(lpFileName: LPCWSTR) -> HMODULE;
 
diff --git a/src/win32/init.rs b/src/win32/init.rs
index 9b6ec815..365bcb84 100644
--- a/src/win32/init.rs
+++ b/src/win32/init.rs
@@ -349,14 +349,6 @@ pub fn new_window(builder: WindowBuilder) -> Result<Window, String> {
             is_closed: AtomicBool::new(false),
         };
 
-        // calling glViewport
-        unsafe {
-            use libc;
-            let dimensions = window.get_inner_size().unwrap();
-            ffi::glViewport(0, 0, dimensions.val0() as libc::c_int,
-                dimensions.val1() as libc::c_int);
-        }
-
         // sending
         tx.send(Ok(window));