diff --git a/dlls/gdi32/dibdrv/dc.c b/dlls/gdi32/dibdrv/dc.c
index f9b5e7ba70b..2c61d297a14 100644
--- a/dlls/gdi32/dibdrv/dc.c
+++ b/dlls/gdi32/dibdrv/dc.c
@@ -67,8 +67,8 @@ static void init_bit_fields(dib_info *dib, const DWORD *bit_fields)
     calc_shift_and_len(dib->blue_mask,  &dib->blue_shift,  &dib->blue_len);
 }
 
-BOOL init_dib_info(dib_info *dib, const BITMAPINFOHEADER *bi, const DWORD *bit_fields,
-                   RGBQUAD *color_table, int color_table_size, void *bits, enum dib_info_flags flags)
+static BOOL init_dib_info(dib_info *dib, const BITMAPINFOHEADER *bi, const DWORD *bit_fields,
+                          RGBQUAD *color_table, int color_table_size, void *bits, enum dib_info_flags flags)
 {
     dib->bit_count    = bi->biBitCount;
     dib->width        = bi->biWidth;
diff --git a/dlls/gdi32/dibdrv/dibdrv.h b/dlls/gdi32/dibdrv/dibdrv.h
index e3782df604a..28633e04eab 100644
--- a/dlls/gdi32/dibdrv/dibdrv.h
+++ b/dlls/gdi32/dibdrv/dibdrv.h
@@ -224,9 +224,6 @@ extern void get_rop_codes(INT rop, struct rop_codes *codes) DECLSPEC_HIDDEN;
 extern void calc_and_xor_masks(INT rop, DWORD color, DWORD *and, DWORD *xor) DECLSPEC_HIDDEN;
 extern void update_brush_rop( dibdrv_physdev *pdev, INT rop ) DECLSPEC_HIDDEN;
 extern void reset_dash_origin(dibdrv_physdev *pdev) DECLSPEC_HIDDEN;
-extern BOOL init_dib_info(dib_info *dib, const BITMAPINFOHEADER *bi, const DWORD *bit_fields,
-                          RGBQUAD *color_table, int color_table_size, void *bits,
-                          enum dib_info_flags flags) DECLSPEC_HIDDEN;
 extern BOOL init_dib_info_from_brush(dib_info *dib, const BITMAPINFO *bi, void *bits, UINT usage, HPALETTE pal) DECLSPEC_HIDDEN;
 extern BOOL init_dib_info_from_bitmapinfo(dib_info *dib, const BITMAPINFO *info, void *bits,
                                           enum dib_info_flags flags) DECLSPEC_HIDDEN;