diff --git a/fennel b/fennel
index e364a16..46cce58 100755
--- a/fennel
+++ b/fennel
@@ -5117,7 +5117,7 @@ package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(..
         end
         return ((0 < #parts) and parts)
       end
-      return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and _154_())
+      return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(-1) ~= string.byte(".")) and (str:byte() ~= string.byte(":")) and (str:byte(-1) ~= string.byte(":")) and _154_())
     end
   end
   local function quoted_3f(symbol)
diff --git a/src/fennel.lua b/src/fennel.lua
index ac75b59..98b1b11 100644
--- a/src/fennel.lua
+++ b/src/fennel.lua
@@ -4919,7 +4919,7 @@ package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(..
         end
         return ((0 < #parts) and parts)
       end
-      return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and _154_())
+      return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(-1) ~= string.byte(".")) and (str:byte() ~= string.byte(":")) and (str:byte(-1) ~= string.byte(":")) and _154_())
     end
   end
   local function quoted_3f(symbol)
diff --git a/test/completion-test.fnl b/test/completion-test.fnl
index b213b54..f19f69f 100644
--- a/test/completion-test.fnl
+++ b/test/completion-test.fnl
@@ -70,8 +70,8 @@
     (it "still completes items from the previous definitions in the same `let`"
       (check-completion "(let [a 10\n      b 20\n      " 1 6 [:a :b]))
 
-    ;; (it "completes fields with a partially typed multisym that ends in :"
-    ;;   (check-completion "(local x {:field (fn [])})\n(x:" 1 3 [:field]))
+    (it "completes fields with a partially typed multisym that ends in :"
+      (check-completion "(local x {:field (fn [])})\n(x:" 1 3 [:field]))
 
     (it "doesn't crash with a partially typed multisym contains ::"
       (check-no-completion "(local x {:field (fn [])})\n(x::f" 1 3 [:field])))