diff --git a/.changeset/fix-drizzle-encrypted-datatype.md b/.changeset/fix-drizzle-encrypted-datatype.md
new file mode 100644
index 00000000..eb7548b4
--- /dev/null
+++ b/.changeset/fix-drizzle-encrypted-datatype.md
@@ -0,0 +1,11 @@
+---
+'@cipherstash/stack': patch
+'@cipherstash/cli': patch
+---
+
+Fix mangled `eql_v2_encrypted` type in drizzle-kit migrations.
+
+- `@cipherstash/stack/drizzle`'s `encryptedType` now returns the bare `eql_v2_encrypted` identifier from its Drizzle `customType.dataType()` callback. Returning the schema-qualified `"public"."eql_v2_encrypted"` (0.15.0) triggered a drizzle-kit quirk that wraps the return value in double-quotes and prepends `"{typeSchema}".` in ALTER COLUMN output — producing `"undefined".""public"."eql_v2_encrypted""`, which Postgres cannot parse.
+- `stash db install` / `stash wizard`'s migration rewriter now matches all four forms drizzle-kit may emit (`eql_v2_encrypted`, `"public"."eql_v2_encrypted"`, `"undefined"."eql_v2_encrypted"`, `"undefined".""public"."eql_v2_encrypted""`) and rewrites each into the safe `ADD COLUMN … DROP COLUMN … RENAME COLUMN` sequence.
+
+Users on 0.15.0 who hit this in generated migrations should upgrade and re-run `npx drizzle-kit generate` + `stash db install` (or re-run the wizard).
diff --git a/packages/cli/src/__tests__/rewrite-migrations.test.ts b/packages/cli/src/__tests__/rewrite-migrations.test.ts
index 4752d358..ad5d21b5 100644
--- a/packages/cli/src/__tests__/rewrite-migrations.test.ts
+++ b/packages/cli/src/__tests__/rewrite-migrations.test.ts
@@ -51,6 +51,36 @@ describe('rewriteEncryptedAlterColumns', () => {
     expect(updated).not.toContain('SET DATA TYPE')
   })
 
+  it('rewrites the "undefined" schema form drizzle-kit emits for bare custom types', async () => {
+    const original =
+      'ALTER TABLE "transactions" ALTER COLUMN "amount" SET DATA TYPE "undefined"."eql_v2_encrypted";\n'
+    const filePath = path.join(tmpDir, '0005_undef.sql')
+    fs.writeFileSync(filePath, original)
+
+    await rewriteEncryptedAlterColumns(tmpDir)
+
+    const updated = fs.readFileSync(filePath, 'utf-8')
+    expect(updated).toContain(
+      'ALTER TABLE "transactions" ADD COLUMN "amount__cipherstash_tmp" "public"."eql_v2_encrypted";',
+    )
+    expect(updated).not.toContain('SET DATA TYPE')
+  })
+
+  it('rewrites the double-quoted form produced by stack 0.15.0', async () => {
+    const original =
+      'ALTER TABLE "transactions" ALTER COLUMN "description" SET DATA TYPE "undefined".""public"."eql_v2_encrypted"";\n'
+    const filePath = path.join(tmpDir, '0006_double.sql')
+    fs.writeFileSync(filePath, original)
+
+    await rewriteEncryptedAlterColumns(tmpDir)
+
+    const updated = fs.readFileSync(filePath, 'utf-8')
+    expect(updated).toContain(
+      'ALTER TABLE "transactions" ADD COLUMN "description__cipherstash_tmp" "public"."eql_v2_encrypted";',
+    )
+    expect(updated).not.toContain('SET DATA TYPE')
+  })
+
   it('leaves unrelated migrations untouched', async () => {
     const original =
       'CREATE TABLE "widgets" ("id" integer PRIMARY KEY, "name" text);\n'
diff --git a/packages/cli/src/commands/db/rewrite-migrations.ts b/packages/cli/src/commands/db/rewrite-migrations.ts
index 55fa7611..0b6cadfe 100644
--- a/packages/cli/src/commands/db/rewrite-migrations.ts
+++ b/packages/cli/src/commands/db/rewrite-migrations.ts
@@ -3,16 +3,23 @@ import { join } from 'node:path'
 
 /**
  * Matches drizzle-kit's generated in-place type change to the encrypted
- * column type. We accept both the fully-qualified
- * `"public"."eql_v2_encrypted"` form (emitted after CIP-2990) and the bare
- * `eql_v2_encrypted` form older schemas produced.
+ * column type. drizzle-kit's ALTER COLUMN path wraps the customType
+ * `dataType()` return value in double-quotes and prepends `"{typeSchema}".`.
+ * Custom types have no `typeSchema`, so we see several mangled forms
+ * depending on what `dataType()` returned. We match all of them:
+ *
+ * - bare `eql_v2_encrypted` → `"undefined"."eql_v2_encrypted"`
+ * - pre-quoted `"public"."eql_v2_encrypted"` (stack 0.15.0 regression) →
+ *   `"undefined".""public"."eql_v2_encrypted""`
+ * - the plain `eql_v2_encrypted` and `"public"."eql_v2_encrypted"` forms,
+ *   in case a future drizzle-kit release stops prepending undefined.
  *
  * Captures:
  * - $1: table name (without quotes)
  * - $2: column name (without quotes)
  */
 const ALTER_COLUMN_TO_ENCRYPTED_RE =
-  /ALTER TABLE "([^"]+)"\s+ALTER COLUMN "([^"]+)"\s+SET DATA TYPE (?:"public"\."eql_v2_encrypted"|eql_v2_encrypted)[^;]*;/gi
+  /ALTER TABLE "([^"]+)"\s+ALTER COLUMN "([^"]+)"\s+SET DATA TYPE (?:"undefined"\.""public"\."eql_v2_encrypted""|"undefined"\."eql_v2_encrypted"|"public"\."eql_v2_encrypted"|eql_v2_encrypted)[^;]*;/gi
 
 /**
  * Replace in-place `ALTER COLUMN ... SET DATA TYPE eql_v2_encrypted` statements
diff --git a/packages/stack/src/drizzle/index.ts b/packages/stack/src/drizzle/index.ts
index bc4e1eda..d88027f2 100644
--- a/packages/stack/src/drizzle/index.ts
+++ b/packages/stack/src/drizzle/index.ts
@@ -4,12 +4,18 @@ import { customType } from 'drizzle-orm/pg-core'
 export type { CastAs, MatchIndexOpts, TokenFilter }
 
 // The encrypted column type is created by the EQL install script in the
-// `public` schema (see packages/cli/src/installer/index.ts). Emitting the
-// fully-qualified, quoted identifier here means drizzle-kit writes
-// `"public"."eql_v2_encrypted"` into generated migrations instead of
-// `"undefined"."eql_v2_encrypted"`, which was the symptom that drizzle-kit
-// couldn't resolve against the database.
-const EQL_ENCRYPTED_DATA_TYPE = '"public"."eql_v2_encrypted"'
+// `public` schema (see packages/cli/src/installer/index.ts). We return the
+// bare identifier here — drizzle-kit's CREATE TABLE path emits it correctly
+// (it only prepends a schema when `typeSchema` is set, which is only true
+// for pgEnum columns). The ALTER COLUMN path is a different story: it
+// unconditionally wraps the dataType() return in double-quotes and prepends
+// `"{typeSchema}".`, and since custom types have no typeSchema, the output
+// becomes `"undefined"."eql_v2_encrypted"`. Returning a pre-quoted
+// `"public"."eql_v2_encrypted"` here does NOT fix that — drizzle-kit just
+// double-escapes the quotes, producing `"undefined".""public"."eql_v2_encrypted""`.
+// Instead, the CLI's `rewriteEncryptedAlterColumns` rewrites every broken
+// ALTER COLUMN form into an ADD + DROP + RENAME sequence that does work.
+const EQL_ENCRYPTED_DATA_TYPE = 'eql_v2_encrypted'
 
 /**
  * Configuration for encrypted column indexes and data types
@@ -174,12 +180,12 @@ export function getEncryptedColumnConfig(
     const columnAny = column as any
 
     // Check if it's an encrypted column by checking sqlName or dataType.
-    // We accept both the fully-qualified `"public"."eql_v2_encrypted"` form
-    // that `encryptedType` now emits and the bare `eql_v2_encrypted` form
-    // that earlier versions produced, for back-compat with tables built
-    // against older releases.
+    // We accept both the bare `eql_v2_encrypted` form (current) and the
+    // fully-qualified `"public"."eql_v2_encrypted"` form that @cipherstash/stack
+    // 0.15.0 briefly emitted, for back-compat with tables built against that
+    // release.
     const isEncryptedTypeString = (value: unknown): boolean =>
-      value === EQL_ENCRYPTED_DATA_TYPE || value === 'eql_v2_encrypted'
+      value === EQL_ENCRYPTED_DATA_TYPE || value === '"public"."eql_v2_encrypted"'
 
     const isEncrypted =
       isEncryptedTypeString(columnAny.sqlName) ||