diff --git a/prboom2/src/g_game.c b/prboom2/src/g_game.c
index 1eb7613d2..8dab991c1 100644
--- a/prboom2/src/g_game.c
+++ b/prboom2/src/g_game.c
@@ -35,6 +35,7 @@
  *-----------------------------------------------------------------------------
  */
 
+#include <math.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
@@ -1435,7 +1436,7 @@ dboolean G_Responder (event_t* ev)
     case ev_move_analog:
       dsda_WatchGameControllerEvent();
 
-      left_analog_x = ev->data1.f;
+      left_analog_x = dsda_StrictMode() ? lroundf(ev->data1.f * 0.5f) * 2 : ev->data1.f;
       left_analog_y = ev->data2.f;
       return true;    // eat events