diff --git a/sysinstall/sysinstall.c b/sysinstall/sysinstall.c
index bbdca857..11f8ba0b 100644
--- a/sysinstall/sysinstall.c
+++ b/sysinstall/sysinstall.c
@@ -651,7 +651,8 @@ int main(void)
 		while ( true )
 		{
 			prompt(input, sizeof(input), "videomode",
-			       "Select a default display resolution? (yes/no)", def);
+			       "Select display resolution? "
+			       "(yes/no/WIDTHxHEIGHTxBPP)", def);
 			unsigned int xres, yres, bpp;
 			bool set = sscanf(input, "%ux%ux%u", &xres, &yres, &bpp) == 3;
 			if ( !strcasecmp(input, "no") )
diff --git a/sysinstall/sysupgrade.c b/sysinstall/sysupgrade.c
index a6805517..fd08fc80 100644
--- a/sysinstall/sysupgrade.c
+++ b/sysinstall/sysupgrade.c
@@ -536,7 +536,8 @@ int main(void)
 		while ( true )
 		{
 			prompt(input, sizeof(input), "videomode",
-			       "Select display resolution? (yes/no)", def);
+			       "Select display resolution? "
+			       "(yes/no/WIDTHxHEIGHTxBPP)", def);
 			unsigned int xres, yres, bpp;
 			bool set = sscanf(input, "%ux%ux%u", &xres, &yres, &bpp) == 3;
 			if ( !set && strcasecmp(input, "no") && strcasecmp(input, "yes") )