diff --git a/src/dfmt/formatter.d b/src/dfmt/formatter.d
index 6f9b7cc..ae3f798 100644
--- a/src/dfmt/formatter.d
+++ b/src/dfmt/formatter.d
@@ -211,7 +211,9 @@ private:
             {
                 immutable t = tokens[index].type;
                 if (t == tok!"identifier" || isStringLiteral(t)
-                        || isNumberLiteral(t) || t == tok!"characterLiteral")
+                        || isNumberLiteral(t) || t == tok!"characterLiteral"
+                        // a!"b" function()
+                        || t == tok!"function" || t == tok!"delegate")
                     write(" ");
             }
         }
diff --git a/tests/allman/issue0497.d.ref b/tests/allman/issue0497.d.ref
new file mode 100644
index 0000000..eec042e
--- /dev/null
+++ b/tests/allman/issue0497.d.ref
@@ -0,0 +1,5 @@
+alias f1 = S function();
+alias f2 = S!"foo" function();
+alias f3 = S!5 function();
+alias f4 = S!S function();
+alias f5 = S!(S) function();
diff --git a/tests/issue0497.d b/tests/issue0497.d
new file mode 100644
index 0000000..eec042e
--- /dev/null
+++ b/tests/issue0497.d
@@ -0,0 +1,5 @@
+alias f1 = S function();
+alias f2 = S!"foo" function();
+alias f3 = S!5 function();
+alias f4 = S!S function();
+alias f5 = S!(S) function();
diff --git a/tests/otbs/issue0497.d.ref b/tests/otbs/issue0497.d.ref
new file mode 100644
index 0000000..eec042e
--- /dev/null
+++ b/tests/otbs/issue0497.d.ref
@@ -0,0 +1,5 @@
+alias f1 = S function();
+alias f2 = S!"foo" function();
+alias f3 = S!5 function();
+alias f4 = S!S function();
+alias f5 = S!(S) function();