diff --git a/enhancements/60fps_ex.patch b/enhancements/60fps_ex.patch
index fe7c6e24..9f459359 100644
--- a/enhancements/60fps_ex.patch
+++ b/enhancements/60fps_ex.patch
@@ -1890,24 +1890,28 @@ index 0467495..fa4eb33 100644
  
  using namespace Microsoft::WRL; // For ComPtr
 diff --git a/src/pc/gfx/gfx_sdl2.c b/src/pc/gfx/gfx_sdl2.c
-index aef2978..ff53b27 100644
+index 25c9f06..a6461ae 100644
 --- a/src/pc/gfx/gfx_sdl2.c
 +++ b/src/pc/gfx/gfx_sdl2.c
 @@ -53,7 +53,7 @@ static void (*kb_all_keys_up)(void) = NULL;
  // whether to use timer for frame control
  static bool use_timer = true;
  // time between consequtive game frames
--static const Uint32 frame_time = 1000 / FRAMERATE;
-+static const Uint32 frame_time = 1000 / (2 * FRAMERATE);
- static Uint32 frame_start = 0;
+-static const int frame_time = 1000 / FRAMERATE;
++static const int frame_time = 1000 / (2 * FRAMERATE);
  
  const SDL_Scancode windows_scancode_table[] = {
-@@ -142,7 +142,7 @@ static inline void gfx_sdl_set_vsync(int mode) {
-     if (mode > 1) {
+   /*  0                        1                            2                         3                            4                     5                            6                            7  */
+@@ -142,7 +142,11 @@ static inline void gfx_sdl_set_vsync(const bool enabled) {
+     if (enabled) {
          // try to detect refresh rate
          SDL_GL_SetSwapInterval(1);
 -        const int vblanks = test_vsync();
-+        const int vblanks = test_vsync() / 2;
++        int vblanks = test_vsync();
++        if (vblanks & 1)
++            vblanks = 0; // not divisible by 60, fuck that
++        else
++            vblanks /= 2;
          if (vblanks) {
              printf("determined swap interval: %d\n", vblanks);
              SDL_GL_SetSwapInterval(vblanks);