diff --git a/src/dfmt.d b/src/dfmt.d
index f7c873f..e61f639 100644
--- a/src/dfmt.d
+++ b/src/dfmt.d
@@ -776,7 +776,7 @@ private:
 			formatAt();
 			break;
 		case tok!"!":
-			if (peekIs(tok!"is"))
+			if (peekIs(tok!"is") && !(peekBackIs(tok!"(") || peekBackIs(tok!"=")))
 				write(" ");
 			goto case;
 		case tok!"...":
diff --git a/tests/allman/issue0116.d.ref b/tests/allman/issue0116.d.ref
new file mode 100644
index 0000000..dad966e
--- /dev/null
+++ b/tests/allman/issue0116.d.ref
@@ -0,0 +1,8 @@
+static assert(!is(T : int));
+
+unittest
+{
+    foo(!is(T : int));
+}
+
+enum a(T) = !is(T : int);
diff --git a/tests/issue0116.d b/tests/issue0116.d
new file mode 100644
index 0000000..7755f3f
--- /dev/null
+++ b/tests/issue0116.d
@@ -0,0 +1,8 @@
+static assert(!is(T : int));
+
+unittest
+{
+	foo(!is(T : int));
+}
+
+enum a(T) = !is(T : int);
diff --git a/tests/otbs/issue0116.d.ref b/tests/otbs/issue0116.d.ref
new file mode 100644
index 0000000..c8b6a99
--- /dev/null
+++ b/tests/otbs/issue0116.d.ref
@@ -0,0 +1,7 @@
+static assert(!is(T : int));
+
+unittest {
+    foo(!is(T : int));
+}
+
+enum a(T) = !is(T : int);