diff --git a/core/sys/windows/gdi32.odin b/core/sys/windows/gdi32.odin
index 274cae35b..d83d2aa6c 100644
--- a/core/sys/windows/gdi32.odin
+++ b/core/sys/windows/gdi32.odin
@@ -62,6 +62,7 @@ foreign gdi32 {
 
 	SetPixelFormat :: proc(hdc: HDC, format: c_int, ppfd: ^PIXELFORMATDESCRIPTOR) -> BOOL ---
 	ChoosePixelFormat :: proc(hdc: HDC, ppfd: ^PIXELFORMATDESCRIPTOR) -> c_int ---
+	DescribePixelFormat :: proc(hdc: HDC, iPixelFormat: c_int, nBytes: UINT, ppfd: ^PIXELFORMATDESCRIPTOR) -> c_int ---
 	SwapBuffers :: proc(HDC) -> BOOL ---
 
 	SetDCBrushColor :: proc(hdc: HDC, color: COLORREF) -> COLORREF ---