diff --git a/docs/source/usingmame/defaultkeys.rst b/docs/source/usingmame/defaultkeys.rst
index f7a7e8ba68268..b3357c58f267e 100644
--- a/docs/source/usingmame/defaultkeys.rst
+++ b/docs/source/usingmame/defaultkeys.rst
@@ -159,10 +159,10 @@ and saving/loading save states.
     similar to the load option above. If an existing save state is present, it
     will also appear in the selection menu to allow overwriting of that save
     state.
-**F8**
-    Decrease frame skipping on the fly.
 **F9**
     Increase frame skipping on the fly.
+**Left Shift+F9**
+    Decrease frame skipping on the fly.
 **F10**
     Toggle speed throttling.
 **F11**
diff --git a/src/emu/inpttype.ipp b/src/emu/inpttype.ipp
index e5cb81c45fc21..cf4386d27d143 100644
--- a/src/emu/inpttype.ipp
+++ b/src/emu/inpttype.ipp
@@ -898,8 +898,8 @@ namespace {
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_RESET_MACHINE,     N_p("input-name", "Reset Machine"),          input_seq(KEYCODE_F3, KEYCODE_LSHIFT, input_seq::or_code, KEYCODE_F3, KEYCODE_RSHIFT) ) \
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_SOFT_RESET,        N_p("input-name", "Soft Reset"),             input_seq(KEYCODE_F3, input_seq::not_code, KEYCODE_LSHIFT, input_seq::not_code, KEYCODE_RSHIFT) ) \
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_SHOW_GFX,          N_p("input-name", "Show Decoded Graphics"),  input_seq(KEYCODE_F4) ) \
-		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_FRAMESKIP_DEC,     N_p("input-name", "Frameskip Dec"),          input_seq(KEYCODE_F8) ) \
-		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_FRAMESKIP_INC,     N_p("input-name", "Frameskip Inc"),          input_seq(KEYCODE_F9) ) \
+		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_FRAMESKIP_DEC,     N_p("input-name", "Frameskip Dec"),          input_seq(KEYCODE_F9, KEYCODE_LSHIFT, input_seq::or_code, KEYCODE_F9, KEYCODE_RSHIFT) ) \
+		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_FRAMESKIP_INC,     N_p("input-name", "Frameskip Inc"),          input_seq(KEYCODE_F9, input_seq::not_code, KEYCODE_LSHIFT, input_seq::not_code, KEYCODE_RSHIFT) ) \
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_THROTTLE,          N_p("input-name", "Throttle"),               input_seq(KEYCODE_F10) ) \
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_FAST_FORWARD,      N_p("input-name", "Fast Forward"),           input_seq(KEYCODE_INSERT) ) \
 		INPUT_PORT_DIGITAL_TYPE( 0, UI,       UI_SHOW_FPS,          N_p("input-name", "Show FPS"),               input_seq(KEYCODE_F11, input_seq::not_code, KEYCODE_LSHIFT) ) \