diff --git a/src/lib_raddbg_markup/raddbg_markup.c b/src/lib_raddbg_markup/raddbg_markup.c
index a30cb685..a4674fbb 100644
--- a/src/lib_raddbg_markup/raddbg_markup.c
+++ b/src/lib_raddbg_markup/raddbg_markup.c
@@ -41,7 +41,7 @@ extern "C"
   long long _InterlockedExchangeAdd64(long long volatile*, long long);
 #pragma intrinsic(_InterlockedCompareExchange64)
 #pragma intrinsic(_InterlockedExchangeAdd64)
-  int raddbg_markup_vsnprintf(char *, unsigned long long, const char *, __builtin_va_list);
+  int raddbg_markup_vsnprintf(char *, unsigned long long, const char *, va_list);
 #if defined(__cplusplus)
 }
 #endif
diff --git a/src/ui/ui_core.c b/src/ui/ui_core.c
index cc1249a3..d2b79b83 100644
--- a/src/ui/ui_core.c
+++ b/src/ui/ui_core.c
@@ -2415,7 +2415,7 @@ ui_box_text_position(UI_Box *box)
     case UI_TextAlign_Center:
     {
       Vec2F32 text_dim = box->display_string_runs.dim;
-      result.x = floor_f32((box->rect.p0.x + box->rect.p1.x)/2 - text_dim.x/2);
+      result.x = round_f32((box->rect.p0.x + box->rect.p1.x)/2 - text_dim.x/2);
       result.x = ClampBot(result.x, box->rect.x0);
     }break;
     case UI_TextAlign_Right: