diff --git a/bootloader/gfx/gfx.c b/bootloader/gfx/gfx.c
index 37d7c372..eae99e20 100644
--- a/bootloader/gfx/gfx.c
+++ b/bootloader/gfx/gfx.c
@@ -128,9 +128,9 @@ void gfx_clear_grey(u8 color)
 	memset(gfx_ctxt.fb, color, gfx_ctxt.width * gfx_ctxt.height * 4);
 }
 
-void gfx_clear_partial_grey(u8 color, u32 pos_x, u32 height)
+void gfx_clear_partial_grey(u8 color, u32 pos_y, u32 height)
 {
-	memset(gfx_ctxt.fb + pos_x * gfx_ctxt.stride, color, height * 4 * gfx_ctxt.stride);
+	memset(gfx_ctxt.fb + pos_y * gfx_ctxt.stride, color, height * 4 * gfx_ctxt.stride);
 }
 
 void gfx_clear_color(u32 color)
diff --git a/bootloader/gfx/gfx.h b/bootloader/gfx/gfx.h
index b2fa9152..141e101f 100644
--- a/bootloader/gfx/gfx.h
+++ b/bootloader/gfx/gfx.h
@@ -69,7 +69,7 @@ extern gfx_con_t gfx_con;
 
 void gfx_init_ctxt(u32 *fb, u32 width, u32 height, u32 stride);
 void gfx_clear_grey(u8 color);
-void gfx_clear_partial_grey(u8 color, u32 pos_x, u32 height);
+void gfx_clear_partial_grey(u8 color, u32 pos_y, u32 height);
 void gfx_clear_color(u32 color);
 void gfx_con_init();
 void gfx_con_setcol(u32 fgcol, int fillbg, u32 bgcol);