diff --git a/dlls/mshtml/htmlstyle.c b/dlls/mshtml/htmlstyle.c
index 0159dac75bd..388d200fa32 100644
--- a/dlls/mshtml/htmlstyle.c
+++ b/dlls/mshtml/htmlstyle.c
@@ -573,6 +573,11 @@ static const style_tbl_entry_t style_tbl[] = {
         DISPID_IHTMLCSSSTYLEDECLARATION2_COLUMNRULESTYLE,
         DISPID_UNKNOWN
     },
+    {
+        L"column-rule-width",
+        DISPID_IHTMLCSSSTYLEDECLARATION2_COLUMNRULEWIDTH,
+        DISPID_UNKNOWN
+    },
     {
         L"column-span",
         DISPID_IHTMLCSSSTYLEDECLARATION2_COLUMNSPAN,
@@ -8955,15 +8960,15 @@ static HRESULT WINAPI HTMLCSSStyleDeclaration2_get_columnRuleStyle(IHTMLCSSStyle
 static HRESULT WINAPI HTMLCSSStyleDeclaration2_put_columnRuleWidth(IHTMLCSSStyleDeclaration2 *iface, VARIANT v)
 {
     CSSStyle *This = impl_from_IHTMLCSSStyleDeclaration2(iface);
-    FIXME("(%p)->(%s)\n", This, debugstr_variant(&v));
-    return E_NOTIMPL;
+    WARN("(%p)->(%s) semi-stub\n", This, debugstr_variant(&v));
+    return set_style_property_var(This, STYLEID_COLUMN_RULE_WIDTH, &v);
 }
 
 static HRESULT WINAPI HTMLCSSStyleDeclaration2_get_columnRuleWidth(IHTMLCSSStyleDeclaration2 *iface, VARIANT *p)
 {
     CSSStyle *This = impl_from_IHTMLCSSStyleDeclaration2(iface);
-    FIXME("(%p)->(%p)\n", This, p);
-    return E_NOTIMPL;
+    WARN("(%p)->(%p) semi-stub\n", This, p);
+    return get_style_property_var(This, STYLEID_COLUMN_RULE_WIDTH, p);
 }
 
 static HRESULT WINAPI HTMLCSSStyleDeclaration2_put_breakBefore(IHTMLCSSStyleDeclaration2 *iface, BSTR v)
diff --git a/dlls/mshtml/htmlstyle.h b/dlls/mshtml/htmlstyle.h
index 5823ccdf002..c85e2be9e6a 100644
--- a/dlls/mshtml/htmlstyle.h
+++ b/dlls/mshtml/htmlstyle.h
@@ -86,6 +86,7 @@ typedef enum {
     STYLEID_COLUMN_GAP,
     STYLEID_COLUMN_RULE_COLOR,
     STYLEID_COLUMN_RULE_STYLE,
+    STYLEID_COLUMN_RULE_WIDTH,
     STYLEID_COLUMN_SPAN,
     STYLEID_COLUMN_WIDTH,
     STYLEID_CURSOR,
diff --git a/dlls/mshtml/tests/style.c b/dlls/mshtml/tests/style.c
index cc6c2ec6f94..f56b68d2b2a 100644
--- a/dlls/mshtml/tests/style.c
+++ b/dlls/mshtml/tests/style.c
@@ -1054,6 +1054,25 @@ static void test_css_style_declaration2(IHTMLCSSStyleDeclaration2 *css_style)
     todo_wine
     ok(str && !lstrcmpW(str, L"solid"), "columnRuleStyle = %s\n", wine_dbgstr_w(str));
     SysFreeString(str);
+
+    V_VT(&v) = VT_ERROR;
+    hres = IHTMLCSSStyleDeclaration2_get_columnRuleWidth(css_style, &v);
+    ok(hres == S_OK, "get_columnRuleWidth failed: %08x\n", hres);
+    ok(V_VT(&v) == VT_BSTR && !V_BSTR(&v), "columnRuleWidth = %s\n", wine_dbgstr_variant(&v));
+    VariantClear(&v);
+
+    V_VT(&v) = VT_BSTR;
+    V_BSTR(&v) = SysAllocString(L"10px");
+    hres = IHTMLCSSStyleDeclaration2_put_columnRuleWidth(css_style, v);
+    ok(hres == S_OK, "put_columnRuleWidth failed: %08x\n", hres);
+    VariantClear(&v);
+
+    V_VT(&v) = VT_ERROR;
+    hres = IHTMLCSSStyleDeclaration2_get_columnRuleWidth(css_style, &v);
+    ok(hres == S_OK, "get_columnRuleWidth failed: %08x\n", hres);
+    todo_wine
+    ok(V_VT(&v) == VT_BSTR && V_BSTR(&v) && !lstrcmpW(V_BSTR(&v), L"10px"), "columnRuleWidth = %s\n", wine_dbgstr_variant(&v));
+    VariantClear(&v);
 }
 
 static void test_body_style(IHTMLStyle *style)