diff --git a/dlls/dwrite/dwrite_private.h b/dlls/dwrite/dwrite_private.h
index c65166dd05b..a0632b7771a 100644
--- a/dlls/dwrite/dwrite_private.h
+++ b/dlls/dwrite/dwrite_private.h
@@ -202,6 +202,8 @@ extern void factory_detach_gdiinterop(IDWriteFactory5*,IDWriteGdiInterop1*) DECL
 extern struct fontfacecached *factory_cache_fontface(IDWriteFactory5*,struct list*,IDWriteFontFace4*) DECLSPEC_HIDDEN;
 extern void    get_logfont_from_font(IDWriteFont*,LOGFONTW*) DECLSPEC_HIDDEN;
 extern void    get_logfont_from_fontface(IDWriteFontFace*,LOGFONTW*) DECLSPEC_HIDDEN;
+extern HRESULT get_fontsig_from_font(IDWriteFont*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
+extern HRESULT get_fontsig_from_fontface(IDWriteFontFace*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 extern HRESULT create_gdiinterop(IDWriteFactory5*,IDWriteGdiInterop1**) DECLSPEC_HIDDEN;
 extern void fontface_detach_from_cache(IDWriteFontFace4*) DECLSPEC_HIDDEN;
 extern void factory_lock(IDWriteFactory5*) DECLSPEC_HIDDEN;
@@ -213,6 +215,7 @@ struct dwrite_font_props {
     DWRITE_FONT_STRETCH stretch;
     DWRITE_FONT_WEIGHT weight;
     DWRITE_PANOSE panose;
+    FONTSIGNATURE fontsig;
     LOGFONTW lf;
 };
 
@@ -235,7 +238,6 @@ extern BOOL opentype_get_vdmx_size(const void*,INT,UINT16*,UINT16*) DECLSPEC_HID
 extern UINT32 opentype_get_cpal_palettecount(const void*) DECLSPEC_HIDDEN;
 extern UINT32 opentype_get_cpal_paletteentrycount(const void*) DECLSPEC_HIDDEN;
 extern HRESULT opentype_get_cpal_entries(const void*,UINT32,UINT32,UINT32,DWRITE_COLOR_F*) DECLSPEC_HIDDEN;
-extern HRESULT opentype_get_font_signature(struct file_stream_desc*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 extern BOOL opentype_has_vertical_variants(IDWriteFontFace4*) DECLSPEC_HIDDEN;
 extern UINT32 opentype_get_glyph_image_formats(IDWriteFontFace4*) DECLSPEC_HIDDEN;
 
diff --git a/dlls/dwrite/font.c b/dlls/dwrite/font.c
index a189f74377a..4dfb47fc7ed 100644
--- a/dlls/dwrite/font.c
+++ b/dlls/dwrite/font.c
@@ -76,6 +76,7 @@ struct dwrite_font_data {
     DWRITE_FONT_STRETCH stretch;
     DWRITE_FONT_WEIGHT weight;
     DWRITE_PANOSE panose;
+    FONTSIGNATURE fontsig;
     struct dwrite_font_propvec propvec;
 
     DWRITE_FONT_METRICS1 metrics;
@@ -242,6 +243,7 @@ struct dwrite_fontface {
     DWRITE_FONT_STRETCH stretch;
     DWRITE_FONT_WEIGHT weight;
     DWRITE_PANOSE panose;
+    FONTSIGNATURE fontsig;
     UINT32 glyph_image_formats;
 
     LOGFONTW lf;
@@ -1769,6 +1771,20 @@ void get_logfont_from_fontface(IDWriteFontFace *iface, LOGFONTW *lf)
     *lf = fontface->lf;
 }
 
+HRESULT get_fontsig_from_font(IDWriteFont *iface, FONTSIGNATURE *fontsig)
+{
+    struct dwrite_font *font = unsafe_impl_from_IDWriteFont(iface);
+    *fontsig = font->data->fontsig;
+    return S_OK;
+}
+
+HRESULT get_fontsig_from_fontface(IDWriteFontFace *iface, FONTSIGNATURE *fontsig)
+{
+    struct dwrite_fontface *fontface = unsafe_impl_from_IDWriteFontFace(iface);
+    *fontsig = fontface->fontsig;
+    return S_OK;
+}
+
 static HRESULT create_font(struct dwrite_fontfamily *family, UINT32 index, IDWriteFont3 **font)
 {
     struct dwrite_font *This;
@@ -3344,6 +3360,7 @@ static HRESULT init_font_data(const struct fontface_desc *desc, IDWriteLocalized
     data->stretch = props.stretch;
     data->weight = props.weight;
     data->panose = props.panose;
+    data->fontsig = props.fontsig;
     data->lf = props.lf;
 
     fontstrings_get_en_string(*family_name, familyW, sizeof(familyW)/sizeof(WCHAR));
@@ -4383,6 +4400,7 @@ HRESULT create_fontface(const struct fontface_desc *desc, struct list *cached_li
         fontface->style = desc->font_data->style;
         fontface->stretch = desc->font_data->stretch;
         fontface->panose = desc->font_data->panose;
+        fontface->fontsig = desc->font_data->fontsig;
         fontface->lf = desc->font_data->lf;
     }
     else {
@@ -4399,6 +4417,7 @@ HRESULT create_fontface(const struct fontface_desc *desc, struct list *cached_li
         fontface->style = data->style;
         fontface->stretch = data->stretch;
         fontface->panose = data->panose;
+        fontface->fontsig = data->fontsig;
         fontface->lf = data->lf;
 
         IDWriteLocalizedStrings_Release(names);
diff --git a/dlls/dwrite/gdiinterop.c b/dlls/dwrite/gdiinterop.c
index 22b4ca482b6..5425b5c4aec 100644
--- a/dlls/dwrite/gdiinterop.c
+++ b/dlls/dwrite/gdiinterop.c
@@ -838,51 +838,22 @@ static HRESULT WINAPI gdiinterop1_GetFontSignature_(IDWriteGdiInterop1 *iface, I
     FONTSIGNATURE *fontsig)
 {
     struct gdiinterop *This = impl_from_IDWriteGdiInterop1(iface);
-    struct file_stream_desc stream_desc;
-    IDWriteFontFileStream *stream;
-    IDWriteFontFile *file;
-    UINT32 count;
-    HRESULT hr;
 
     TRACE("(%p)->(%p %p)\n", This, fontface, fontsig);
 
-    memset(fontsig, 0, sizeof(*fontsig));
-
-    count = 1;
-    hr = IDWriteFontFace_GetFiles(fontface, &count, &file);
-    hr = get_filestream_from_file(file, &stream);
-    IDWriteFontFile_Release(file);
-    if (FAILED(hr))
-        return hr;
-
-    stream_desc.stream = stream;
-    stream_desc.face_type = IDWriteFontFace_GetType(fontface);
-    stream_desc.face_index = IDWriteFontFace_GetIndex(fontface);
-    hr = opentype_get_font_signature(&stream_desc, fontsig);
-    IDWriteFontFileStream_Release(stream);
-    return hr;
+    return get_fontsig_from_fontface(fontface, fontsig);
 }
 
 static HRESULT WINAPI gdiinterop1_GetFontSignature(IDWriteGdiInterop1 *iface, IDWriteFont *font, FONTSIGNATURE *fontsig)
 {
     struct gdiinterop *This = impl_from_IDWriteGdiInterop1(iface);
-    IDWriteFontFace *fontface;
-    HRESULT hr;
 
     TRACE("(%p)->(%p %p)\n", This, font, fontsig);
 
     if (!font)
         return E_INVALIDARG;
 
-    memset(fontsig, 0, sizeof(*fontsig));
-
-    hr = IDWriteFont_CreateFontFace(font, &fontface);
-    if (FAILED(hr))
-        return hr;
-
-    hr = IDWriteGdiInterop1_GetFontSignature_(iface, fontface, fontsig);
-    IDWriteFontFace_Release(fontface);
-    return hr;
+    return get_fontsig_from_font(font, fontsig);
 }
 
 static HRESULT WINAPI gdiinterop1_GetMatchingFontsByLOGFONT(IDWriteGdiInterop1 *iface, LOGFONTW const *logfont,
diff --git a/dlls/dwrite/opentype.c b/dlls/dwrite/opentype.c
index a66500a73b9..36c34b630e4 100644
--- a/dlls/dwrite/opentype.c
+++ b/dlls/dwrite/opentype.c
@@ -1317,6 +1317,7 @@ void opentype_get_font_properties(struct file_stream_desc *stream_desc, struct d
     props->weight = DWRITE_FONT_WEIGHT_NORMAL;
     props->style = DWRITE_FONT_STYLE_NORMAL;
     memset(&props->panose, 0, sizeof(props->panose));
+    memset(&props->fontsig, 0, sizeof(props->fontsig));
     memset(&props->lf, 0, sizeof(props->lf));
 
     /* DWRITE_FONT_STRETCH enumeration values directly match font data values */
@@ -1343,6 +1344,21 @@ void opentype_get_font_properties(struct file_stream_desc *stream_desc, struct d
             props->style = DWRITE_FONT_STYLE_ITALIC;
 
         memcpy(&props->panose, &tt_os2->panose, sizeof(props->panose));
+
+        /* FONTSIGNATURE */
+        props->fontsig.fsUsb[0] = GET_BE_DWORD(tt_os2->ulUnicodeRange1);
+        props->fontsig.fsUsb[1] = GET_BE_DWORD(tt_os2->ulUnicodeRange2);
+        props->fontsig.fsUsb[2] = GET_BE_DWORD(tt_os2->ulUnicodeRange3);
+        props->fontsig.fsUsb[3] = GET_BE_DWORD(tt_os2->ulUnicodeRange4);
+
+        if (GET_BE_WORD(tt_os2->version) == 0) {
+            props->fontsig.fsCsb[0] = 0;
+            props->fontsig.fsCsb[1] = 0;
+        }
+        else {
+            props->fontsig.fsCsb[0] = GET_BE_DWORD(tt_os2->ulCodePageRange1);
+            props->fontsig.fsCsb[1] = GET_BE_DWORD(tt_os2->ulCodePageRange2);
+        }
     }
     else if (tt_head) {
         USHORT macStyle = GET_BE_WORD(tt_head->macStyle);
@@ -1971,34 +1987,6 @@ void opentype_colr_next_glyph(const void *colr, struct dwrite_colorglyph *glyph)
     glyph->palette_index = GET_BE_WORD(layer->paletteIndex);
 }
 
-HRESULT opentype_get_font_signature(struct file_stream_desc *stream_desc, FONTSIGNATURE *fontsig)
-{
-    const TT_OS2_V2 *tt_os2;
-    void *os2_context;
-    HRESULT hr;
-
-    hr = opentype_get_font_table(stream_desc, MS_OS2_TAG,  (const void**)&tt_os2, &os2_context, NULL, NULL);
-    if (tt_os2) {
-        fontsig->fsUsb[0] = GET_BE_DWORD(tt_os2->ulUnicodeRange1);
-        fontsig->fsUsb[1] = GET_BE_DWORD(tt_os2->ulUnicodeRange2);
-        fontsig->fsUsb[2] = GET_BE_DWORD(tt_os2->ulUnicodeRange3);
-        fontsig->fsUsb[3] = GET_BE_DWORD(tt_os2->ulUnicodeRange4);
-
-        if (GET_BE_WORD(tt_os2->version) == 0) {
-            fontsig->fsCsb[0] = 0;
-            fontsig->fsCsb[1] = 0;
-        }
-        else {
-            fontsig->fsCsb[0] = GET_BE_DWORD(tt_os2->ulCodePageRange1);
-            fontsig->fsCsb[1] = GET_BE_DWORD(tt_os2->ulCodePageRange2);
-        }
-
-        IDWriteFontFileStream_ReleaseFileFragment(stream_desc->stream, os2_context);
-    }
-
-    return hr;
-}
-
 BOOL opentype_has_vertical_variants(IDWriteFontFace4 *fontface)
 {
     const OT_FeatureList *featurelist;