diff --git a/src/java.base/share/classes/java/lang/ProcessBuilder.java b/src/java.base/share/classes/java/lang/ProcessBuilder.java
index e870682a38e..e7d5d9debef 100644
--- a/src/java.base/share/classes/java/lang/ProcessBuilder.java
+++ b/src/java.base/share/classes/java/lang/ProcessBuilder.java
@@ -1116,8 +1116,8 @@ public final class ProcessBuilder
 
         String dir = directory == null ? null : directory.toString();
 
-        for (int i = 1; i < cmdarray.length; i++) {
-            if (cmdarray[i].indexOf('\u0000') >= 0) {
+        for (String s : cmdarray) {
+            if (s.indexOf('\u0000') >= 0) {
                 throw new IOException("invalid null character in command");
             }
         }