diff --git a/src/osd/mac/window.cpp b/src/osd/mac/window.cpp
index d3ec18b94a7..54291d69985 100644
--- a/src/osd/mac/window.cpp
+++ b/src/osd/mac/window.cpp
@@ -243,7 +243,7 @@ void mac_window_info::modify_prescale(int dir)
 			notify_changed();
 			m_prescale = new_prescale;
 		}
-		machine().ui().popup_time(1, "Prescale %d/8", prescale());
+		machine().ui().popup_time(1, "Prescale %d", prescale());
 	}
 }
 
diff --git a/src/osd/sdl/window.cpp b/src/osd/sdl/window.cpp
index 41f3b1addc7..2ef34f5db30 100644
--- a/src/osd/sdl/window.cpp
+++ b/src/osd/sdl/window.cpp
@@ -286,7 +286,7 @@ void sdl_window_info::modify_prescale(int dir)
 			m_prescale = new_prescale;
 			notify_changed();
 		}
-		machine().ui().popup_time(1, "Prescale %d/20", prescale());
+		machine().ui().popup_time(1, "Prescale %d", prescale());
 	}
 }