diff --git a/MiSTer.ini b/MiSTer.ini
index 9d2db36..63f728e 100644
--- a/MiSTer.ini
+++ b/MiSTer.ini
@@ -82,6 +82,13 @@ video_info=0
 ; modes as a base even for 50Hz systems. 
 vsync_adjust=0
 
+; If you monitor doesn't support either very low (NTSC monitors may not support PAL) or 
+; very high (PAL monitors may not support NTSC) then you can set refresh_min and/or refresh_max
+; parameters, so vsync_adjust won't be applied for refreshes outside specified.
+; These parameters are valid only when vsync_adjust is non-zero.
+refresh_min=0
+refresh_max=0
+
 ; These parameters have the same format as video_mode.
 ; You need to supply both PAL and NTSC modes if you want vsync_adjust to switch between
 ; predefined modes as a base. This will reduce the range of pixel clock.
diff --git a/cfg.cpp b/cfg.cpp
index 06fcfec..0dcd47c 100644
--- a/cfg.cpp
+++ b/cfg.cpp
@@ -61,6 +61,8 @@ const ini_var_t ini_vars[] = {
 	{ "GAMEPAD_DEFAULTS", (void*)(&(cfg.gamepad_defaults)), UINT8, 0, 1 },
 	{ "RECENTS", (void*)(&(cfg.recents)), UINT8, 0, 1 },
 	{ "CONTROLLER_INFO", (void*)(&(cfg.controller_info)), UINT8, 0, 10 },
+	{ "REFRESH_MIN", (void*)(&(cfg.refresh_min)), UINT8, 0, 150 },
+	{ "REFRESH_MAX", (void*)(&(cfg.refresh_max)), UINT8, 0, 150 },
 };
 
 // mist ini config
diff --git a/cfg.h b/cfg.h
index b2931c7..e4dd249 100644
--- a/cfg.h
+++ b/cfg.h
@@ -26,6 +26,8 @@ typedef struct {
 	uint8_t hdmi_limited;
 	uint8_t direct_video;
 	uint8_t video_info;
+	uint8_t refresh_min;
+	uint8_t refresh_max;
 	uint8_t controller_info;
 	uint8_t vsync_adjust;
 	uint8_t kbd_nomouse;
diff --git a/video.cpp b/video.cpp
index 4169533..e259636 100644
--- a/video.cpp
+++ b/video.cpp
@@ -737,6 +737,19 @@ void video_mode_adjust()
 				printf("Estimated Fpix(%.4f MHz) is outside supported range. Canceling auto-adjust.\n", Fpix);
 				Fpix = 0;
 			}
+
+			uint32_t hz = 100000000 / vtime;
+			if (cfg.refresh_min && hz < cfg.refresh_min)
+			{
+				printf("Estimated frame rate (%d Hz) is less than MONITOR_HZ_MIN(%d Hz). Canceling auto-adjust.\n", hz, cfg.refresh_min);
+				Fpix = 0;
+			}
+
+			if (cfg.refresh_max && hz > cfg.refresh_max)
+			{
+				printf("Estimated frame rate (%d Hz) is more than MONITOR_HZ_MAX(%d Hz). Canceling auto-adjust.\n", hz, cfg.refresh_max);
+				Fpix = 0;
+			}
 		}
 
 		set_video(v, Fpix);