diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index a18443c52..96e3d5b23 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -531,7 +531,7 @@ static void Impl_HandleKeyboardConsoleEvent(KEY_EVENT_RECORD evt, HANDLE co)
 				break;
 			case VK_RETURN:
 				entering_con_command = false;
-				// Fall through.
+				/* FALLTHRU */
 			default:
 				event.data1 = MapVirtualKey(evt.wVirtualKeyCode,2); // convert in to char
 		}
diff --git a/src/win32/win_sys.c b/src/win32/win_sys.c
index d10f73b58..93b3ff523 100644
--- a/src/win32/win_sys.c
+++ b/src/win32/win_sys.c
@@ -327,7 +327,7 @@ static inline VOID I_GetConsoleEvents(VOID)
 							break;
 						case VK_RETURN:
 							entering_con_command = false;
-							// Fall through.
+							/* FALLTHRU */
 						default:
 							ev.data1 = MapVirtualKey(input.Event.KeyEvent.wVirtualKeyCode,2); // convert in to char
 					}