diff --git a/double_pinyin.schema.yaml b/double_pinyin.schema.yaml
index 5bb6602..73e82fb 100644
--- a/double_pinyin.schema.yaml
+++ b/double_pinyin.schema.yaml
@@ -246,7 +246,7 @@ speller:
     - xform/^zh/Ⓥ/
     - xform/uo$/Ⓞ/
     - xform/[uv]n$/Ⓟ/
-    - xform/i?ong$/Ⓢ/
+    - xform/(.)i?ong$/$1Ⓢ/
     - xform/[iu]ang$/Ⓓ/
     - xform/(.)en$/$1Ⓕ/
     - xform/(.)eng$/$1Ⓖ/
diff --git a/double_pinyin_abc.schema.yaml b/double_pinyin_abc.schema.yaml
index afa608e..47fed74 100644
--- a/double_pinyin_abc.schema.yaml
+++ b/double_pinyin_abc.schema.yaml
@@ -246,7 +246,7 @@ speller:
     - xform/ing$/Ⓨ/
     - xform/uo$/Ⓞ/
     - xform/uan$/Ⓟ/
-    - xform/i?ong$/Ⓢ/
+    - xform/(.)i?ong$/$1Ⓢ/
     - xform/[iu]a$/Ⓓ/
     - xform/en$/Ⓕ/
     - xform/eng$/Ⓖ/
diff --git a/double_pinyin_flypy.schema.yaml b/double_pinyin_flypy.schema.yaml
index 740e12b..a0cebe1 100644
--- a/double_pinyin_flypy.schema.yaml
+++ b/double_pinyin_flypy.schema.yaml
@@ -246,7 +246,7 @@ speller:
     - xform/^zh/Ⓥ/
     - xform/uo$/Ⓞ/
     - xform/ie$/Ⓟ/
-    - xform/i?ong$/Ⓢ/
+    - xform/(.)i?ong$/$1Ⓢ/
     - xform/ing$|uai$/Ⓚ/
     - xform/(.)ai$/$1Ⓓ/
     - xform/(.)en$/$1Ⓕ/
diff --git a/double_pinyin_mspy.schema.yaml b/double_pinyin_mspy.schema.yaml
index ee82ecc..b2b7058 100644
--- a/double_pinyin_mspy.schema.yaml
+++ b/double_pinyin_mspy.schema.yaml
@@ -250,7 +250,7 @@ speller:
     - xform/^zh/Ⓥ/
     - xform/uo$/Ⓞ/
     - xform/[uv]n$/Ⓟ/
-    - xform/i?ong$/Ⓢ/
+    - xform/(.)i?ong$/$1Ⓢ/
     - xform/[iu]ang$/Ⓓ/
     - xform/(.)en$/$1Ⓕ/
     - xform/(.)eng$/$1Ⓖ/
diff --git a/double_pinyin_sogou.schema.yaml b/double_pinyin_sogou.schema.yaml
index bc16f55..51e2ca8 100644
--- a/double_pinyin_sogou.schema.yaml
+++ b/double_pinyin_sogou.schema.yaml
@@ -250,7 +250,7 @@ speller:
     - xform/^zh/Ⓥ/
     - xform/uo$/Ⓞ/
     - xform/[uv]n$/Ⓟ/
-    - xform/i?ong$/Ⓢ/
+    - xform/(.)i?ong$/$1Ⓢ/
     - xform/[iu]ang$/Ⓓ/
     - xform/(.)en$/$1Ⓕ/
     - xform/(.)eng$/$1Ⓖ/
diff --git a/double_pinyin_ziguang.schema.yaml b/double_pinyin_ziguang.schema.yaml
index cb78f72..ea90218 100644
--- a/double_pinyin_ziguang.schema.yaml
+++ b/double_pinyin_ziguang.schema.yaml
@@ -249,7 +249,7 @@ speller:
     - xform/ang$/Ⓢ/  # ang should be placed after iang/uang
     - xform/ie$/Ⓓ/
     - xform/ian$/Ⓕ/
-    - xform/i?ong$/Ⓗ/
+    - xform/(.)i?ong$/$1Ⓗ/
     - xform/er$|iu$/Ⓙ/
     - xform/ei$/Ⓚ/
     - xform/uan$/Ⓛ/