diff --git a/reactos/dll/win32/comctl32/imagelist.c b/reactos/dll/win32/comctl32/imagelist.c
index ccc594f09f6..28e2968774e 100644
--- a/reactos/dll/win32/comctl32/imagelist.c
+++ b/reactos/dll/win32/comctl32/imagelist.c
@@ -3094,7 +3094,7 @@ static HBITMAP ImageList_CreateImage(HDC hdc, HIMAGELIST himl, UINT count)
 
     if ((ilc >= ILC_COLOR4 && ilc <= ILC_COLOR32) || ilc == ILC_COLOR)
     {
-        char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
+        char buffer[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
         BITMAPINFO *bmi = (BITMAPINFO *)buffer;
 
         TRACE("Creating DIBSection %d x %d, %d Bits per Pixel\n",
diff --git a/reactos/dll/win32/comctl32/monthcal.c b/reactos/dll/win32/comctl32/monthcal.c
index 83adf600c98..e148a62aa80 100644
--- a/reactos/dll/win32/comctl32/monthcal.c
+++ b/reactos/dll/win32/comctl32/monthcal.c
@@ -160,8 +160,8 @@ static const WCHAR themeClass[] = { 'S','c','r','o','l','l','b','a','r',0 };
 /* empty SYSTEMTIME const */
 static const SYSTEMTIME st_null;
 /* valid date limits */
-static const SYSTEMTIME max_allowed_date = { .wYear = 9999, .wMonth = 12, .wDay = 31 };
-static const SYSTEMTIME min_allowed_date = { .wYear = 1752, .wMonth = 9,  .wDay = 14 };
+static const SYSTEMTIME max_allowed_date = { /* wYear */ 9999, /* wMonth */ 12, /* wDayOfWeek */ 0, /* wDay */ 31 };
+static const SYSTEMTIME min_allowed_date = { /* wYear */ 1752, /* wMonth */ 9,  /* wDayOfWeek */ 0, /* wDay */ 14 };
 
 /* Prev/Next buttons */
 enum nav_direction