diff --git a/src/gui/sdlmain.cpp b/src/gui/sdlmain.cpp
index 2a0965e4508..3f8c1b991a0 100644
--- a/src/gui/sdlmain.cpp
+++ b/src/gui/sdlmain.cpp
@@ -959,6 +959,10 @@ static SDL_Surface * GFX_SetupSurfaceScaledOpenGL(Bit32u sdl_flags, Bit32u bpp)
 	Bit16u fixedWidth;
 	Bit16u fixedHeight;
 
+    int Voodoo_OGL_GetWidth();
+    int Voodoo_OGL_GetHeight();
+    bool Voodoo_OGL_Active();
+
     if (sdl.desktop.prevent_fullscreen) /* 3Dfx openGL do not allow resize */
         sdl_flags &= ~SDL_RESIZABLE;
 
@@ -983,10 +987,11 @@ static SDL_Surface * GFX_SetupSurfaceScaledOpenGL(Bit32u sdl_flags, Bit32u bpp)
         fixedWidth = final_width;
         fixedHeight = final_height;
     }
-    if (sdl.desktop.prevent_fullscreen) { /* 3Dfx openGL do not allow resize */
+    if (Voodoo_OGL_GetWidth() != 0 && Voodoo_OGL_GetHeight() != 0 &&
+        Voodoo_OGL_Active() && sdl.desktop.prevent_fullscreen) { /* 3Dfx openGL do not allow resize */
         sdl.clip.x=0;sdl.clip.y=0;
-        sdl.clip.w=(Bit16u)(render.src.width);
-        sdl.clip.h=(Bit16u)(render.src.height);
+        sdl.clip.w=(Bit16u)Voodoo_OGL_GetWidth();
+        sdl.clip.h=(Bit16u)Voodoo_OGL_GetHeight();
         sdl.surface=SDL_SetVideoMode(sdl.clip.w,sdl.clip.h,bpp,sdl_flags);
         sdl.deferred_resize = false;
         sdl.must_redraw_all = true;
diff --git a/src/hardware/voodoo_opengl.cpp b/src/hardware/voodoo_opengl.cpp
index d79cfe18a21..17e89b39b7a 100644
--- a/src/hardware/voodoo_opengl.cpp
+++ b/src/hardware/voodoo_opengl.cpp
@@ -68,6 +68,18 @@ std::map <const UINT32, ogl_texmap> textures[2];
 
 void GFX_PreventFullscreen(bool lockout);
 
+int Voodoo_OGL_GetWidth() {
+    return v->fbi.width;
+}
+
+int Voodoo_OGL_GetHeight() {
+    return v->fbi.height;
+}
+
+bool Voodoo_OGL_Active() {
+	return (v->clock_enabled && v->output_on);
+}
+
 static void ogl_get_depth(voodoo_state* VV, INT32 ITERZ, INT64 ITERW, INT32 *depthval, INT32 *out_wfloat)
 {
 	INT32 wfloat;