diff --git a/unix4j-core/unix4j-base/src/main/java/org/unix4j/util/StringUtil.java b/unix4j-core/unix4j-base/src/main/java/org/unix4j/util/StringUtil.java
index 7758dc1a..b290668a 100644
--- a/unix4j-core/unix4j-base/src/main/java/org/unix4j/util/StringUtil.java
+++ b/unix4j-core/unix4j-base/src/main/java/org/unix4j/util/StringUtil.java
@@ -428,15 +428,11 @@ private static int indexOfIgnoreCase(String source, String target,
 		final int sourceCount = source.length();
 		final int targetCount = target.length();
 		final char first = target.charAt(0);
-		int max = Math.min(maxIndex, sourceCount - targetCount);
+		final int max = Math.min(maxIndex, sourceCount - targetCount);
 
 		for (int i = 0; i <= max; i++) {
-			final char ch = source.charAt(i);
 			/* Look for first character. */
-			if (!equalsIgnoreCase(ch, first)) {
-				while (++i <= max && !equalsIgnoreCase(ch, first))
-					;
-			}
+			while (!equalsIgnoreCase(source.charAt(i), first) && ++i <= max);
 
 			/* Found first character, now look at the rest of v2 */
 			if (i <= max) {
diff --git a/unix4j-core/unix4j-base/src/test/java/org/unix4j/util/StringUtilTest.java b/unix4j-core/unix4j-base/src/test/java/org/unix4j/util/StringUtilTest.java
index 88cbc2c8..d390b428 100644
--- a/unix4j-core/unix4j-base/src/test/java/org/unix4j/util/StringUtilTest.java
+++ b/unix4j-core/unix4j-base/src/test/java/org/unix4j/util/StringUtilTest.java
@@ -122,4 +122,10 @@ public void findWhitespace() {
 			Assert.assertEquals(expected, StringUtil.findWhitespace(s, i));
 		}
 	}
+	@Test
+	public void indexOfIgnoreCase() {
+	    String source = "abc ade";
+	    String target = "adE";
+	    Assert.assertEquals(4, StringUtil.indexOfIgnoreCase(source, target));
+	}
 }