diff --git a/src/osd/mac/video.cpp b/src/osd/mac/video.cpp
index 3f585458f8d..dbbf0324289 100644
--- a/src/osd/mac/video.cpp
+++ b/src/osd/mac/video.cpp
@@ -232,7 +232,7 @@ void mac_osd_interface::extract_video_config()
 		video_config.syncrefresh = 0;
 	}
 
-	if (video_config.prescale < 1 || video_config.prescale > 3)
+	if (video_config.prescale < 1 || video_config.prescale > 8)
 	{
 		osd_printf_warning("Invalid prescale option, reverting to '1'\n");
 		video_config.prescale = 1;
diff --git a/src/osd/modules/lib/osdobj_common.cpp b/src/osd/modules/lib/osdobj_common.cpp
index 8e284eba055..e807740da5e 100644
--- a/src/osd/modules/lib/osdobj_common.cpp
+++ b/src/osd/modules/lib/osdobj_common.cpp
@@ -95,7 +95,7 @@ const options_entry osd_options::s_option_entries[] =
 
 	{ nullptr,                                nullptr,          OPTION_HEADER,    "OSD ACCELERATED VIDEO OPTIONS" },
 	{ OSDOPTION_FILTER ";glfilter;flt",       "1",              OPTION_BOOLEAN,   "use bilinear filtering when scaling emulated video" },
-	{ OSDOPTION_PRESCALE "(1-3)",             "1",              OPTION_INTEGER,   "scale emulated video by this factor before applying filters/shaders" },
+	{ OSDOPTION_PRESCALE "(1-8)",             "1",              OPTION_INTEGER,   "scale emulated video by this factor before applying filters/shaders" },
 
 #if USE_OPENGL
 	{ nullptr,                                nullptr,          OPTION_HEADER,    "OpenGL-SPECIFIC OPTIONS" },
diff --git a/src/osd/sdl/video.cpp b/src/osd/sdl/video.cpp
index 9fdb6b74c56..e7af55e56ba 100644
--- a/src/osd/sdl/video.cpp
+++ b/src/osd/sdl/video.cpp
@@ -254,7 +254,7 @@ void sdl_osd_interface::extract_video_config()
 		video_config.syncrefresh = 0;
 	}
 
-	if (video_config.prescale < 1 || video_config.prescale > 3)
+	if (video_config.prescale < 1 || video_config.prescale > 8)
 	{
 		osd_printf_warning("Invalid prescale option, reverting to '1'\n");
 		video_config.prescale = 1;
diff --git a/src/osd/uwp/video.cpp b/src/osd/uwp/video.cpp
index 9ed9a6c98d3..f63b76c037e 100644
--- a/src/osd/uwp/video.cpp
+++ b/src/osd/uwp/video.cpp
@@ -178,7 +178,7 @@ void windows_osd_interface::extract_video_config()
 	video_config.triplebuf     = options().triple_buffer();
 	video_config.switchres     = options().switch_res();
 
-	if (video_config.prescale < 1 || video_config.prescale > 3)
+	if (video_config.prescale < 1 || video_config.prescale > 8)
 	{
 		osd_printf_warning("Invalid prescale option, reverting to '1'\n");
 		video_config.prescale = 1;
diff --git a/src/osd/windows/video.cpp b/src/osd/windows/video.cpp
index 3f3fe78f1f7..ca50be44639 100644
--- a/src/osd/windows/video.cpp
+++ b/src/osd/windows/video.cpp
@@ -194,7 +194,7 @@ void windows_osd_interface::extract_video_config()
 	video_config.triplebuf     = options().triple_buffer();
 	video_config.switchres     = options().switch_res();
 
-	if (video_config.prescale < 1 || video_config.prescale > 3)
+	if (video_config.prescale < 1 || video_config.prescale > 8)
 	{
 		osd_printf_warning("Invalid prescale option, reverting to '1'\n");
 		video_config.prescale = 1;