diff --git a/CHANGELOG.md b/CHANGELOG.md
index c048c37..696c16f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 * 2.0.next in progress
   * Fix #328 by adding `:distinct` as special syntax, affecting an expression.
   * Address #327 by changing "unknown clause" error to including mention of "nil values" (which are also illegal).
+  * Fix #327 by making single-argument helpers consistent with multi-argument helpers.
   * Support PostgreSQL's `&&` array operator.
   * Clarify how to `SELECT` a function expression (in **Getting Started**).
 
diff --git a/src/honey/sql/helpers.cljc b/src/honey/sql/helpers.cljc
index 8c9f40d..98aa5d7 100644
--- a/src/honey/sql/helpers.cljc
+++ b/src/honey/sql/helpers.cljc
@@ -87,7 +87,7 @@
     (helper-merge {} k args)))
 
 (defn- generic-1 [k [data arg]]
-  (if (some? arg)
+  (if (map? data)
     (assoc data k arg)
     (assoc {} k data)))