diff --git a/pkl-core/src/main/java/org/pkl/core/util/MathUtils.java b/pkl-core/src/main/java/org/pkl/core/util/MathUtils.java
index 9f2e7f09..05b5cac4 100644
--- a/pkl-core/src/main/java/org/pkl/core/util/MathUtils.java
+++ b/pkl-core/src/main/java/org/pkl/core/util/MathUtils.java
@@ -63,7 +63,7 @@ public final strictfp class MathUtils {
    * Long.bitCount(Long.MIN_VALUE) == 1}, but {@link Long#MIN_VALUE} is not a power of two.
    */
   public static boolean isPowerOfTwo(long x) {
-    return x > 0 & (x & (x - 1)) == 0;
+    return x > 0 && (x & (x - 1)) == 0;
   }
 
   /**