diff --git a/kas.js b/kas.js
index d5e6610..542e17d 100644
--- a/kas.js
+++ b/kas.js
@@ -2976,7 +2976,10 @@ _.extend(Pow.prototype, {
 
     print: function() {
         var base = this.base.print();
-        if (this.base instanceof Seq || this.base instanceof Pow) {
+        if (this.base instanceof Seq ||
+            this.base instanceof Pow ||
+            this.base instanceof Rational && !this.base.isSimple() ||
+            this.base instanceof Num && this.base.isNegative()) {
             base = "(" + base + ")";
         }
         return base + "^(" + this.exp.print() + ")";
diff --git a/src/nodes.js b/src/nodes.js
index 3bd3af4..0bf1d58 100644
--- a/src/nodes.js
+++ b/src/nodes.js
@@ -1443,7 +1443,10 @@ _.extend(Pow.prototype, {
 
     print: function() {
         var base = this.base.print();
-        if (this.base instanceof Seq || this.base instanceof Pow) {
+        if (this.base instanceof Seq ||
+            this.base instanceof Pow ||
+            this.base instanceof Rational && !this.base.isSimple() ||
+            this.base instanceof Num && this.base.isNegative()) {
             base = "(" + base + ")";
         }
         return base + "^(" + this.exp.print() + ")";
diff --git a/test.html b/test.html
index 6efcd03..0782d51 100644
--- a/test.html
+++ b/test.html
@@ -224,6 +224,8 @@ <h2 id="qunit-userAgent"></h2>
 
         print(assert, "x^{a}", "x^(a)");
         print(assert, "x^{ab}", "x^(a*b)");
+        print(assert, "(2/5)^2", "(2/5)^(2)");
+        print(assert, "(-3)^2", "(-3)^(2)");
     });
 
     QUnit.test("square root", function(assert) {