diff --git a/trunk/src/drivers/sdl/gui.cpp b/trunk/src/drivers/sdl/gui.cpp
index 5bf41d97..0f25a7a6 100644
--- a/trunk/src/drivers/sdl/gui.cpp
+++ b/trunk/src/drivers/sdl/gui.cpp
@@ -833,6 +833,15 @@ void resizeGtkWindow()
 void setScaler(GtkWidget* w, gpointer p)
 {
 	int scaler = gtk_combo_box_get_active(GTK_COMBO_BOX(w));
+	int opengl;
+	g_config->getOption("SDL.OpenGL", &opengl);
+	if(opengl && scaler)
+	{
+		FCEUD_PrintError("Scalers not supported in OpenGL mode.");
+		gtk_combo_box_set_active(GTK_COMBO_BOX(w), 0);
+		return;
+	}
+
 	g_config->setOption("SDL.SpecialFilter", scaler);
 	
 	// 1=hq2x 2=Scale2x 3=NTSC2x 4=hq3x  5=Scale3x 6=Prescale2x 7=Prescale3x 8=Prescale4x 9=pal
@@ -890,6 +899,15 @@ int setYscale(GtkWidget* w, gpointer p)
 #ifdef OPENGL
 void setGl(GtkWidget* w, gpointer p)
 {
+	int scaler;
+	int opengl = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(w));
+	g_config->getOption("SDL.SpecialFilter", &scaler);
+	if(scaler && opengl)
+	{
+		FCEUD_PrintError("Scalers not supported in OpenGL mode.");
+		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(w), 0);
+		return;
+	}
 	if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(w)))
 		g_config->setOption("SDL.OpenGL", 1);
 	else
diff --git a/trunk/src/drivers/sdl/sdl.cpp b/trunk/src/drivers/sdl/sdl.cpp
index 6211b133..8994556a 100644
--- a/trunk/src/drivers/sdl/sdl.cpp
+++ b/trunk/src/drivers/sdl/sdl.cpp
@@ -627,6 +627,18 @@ int main(int argc, char *argv[])
     // update the input devices
 	UpdateInput(g_config);
 
+	// check if opengl is enabled with a scaler and display an error and bail	
+	int opengl;
+	int scaler;
+	g_config->getOption("SDL.OpenGL", &opengl);
+	g_config->getOption("SDL.SpecialFilter", &scaler);
+	if(opengl && scaler)
+	{
+		printf("Scalers are not supported in OpenGL mode.  Terminating.\n");
+		exit(2);
+	}
+
+
 	// check for a .fcm file to convert to .fm2
 	g_config->getOption ("SDL.FCMConvert", &s);
 	g_config->setOption ("SDL.FCMConvert", "");