diff --git a/plugins/sh/src/com/intellij/sh/highlighting/ShTextOccurrencesUtil.java b/plugins/sh/src/com/intellij/sh/highlighting/ShTextOccurrencesUtil.java
index 4fc511b50321..5376482a4fdf 100644
--- a/plugins/sh/src/com/intellij/sh/highlighting/ShTextOccurrencesUtil.java
+++ b/plugins/sh/src/com/intellij/sh/highlighting/ShTextOccurrencesUtil.java
@@ -8,6 +8,7 @@ import com.intellij.openapi.util.TextRange;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.CollectConsumer;
 import com.intellij.util.Consumer;
+import com.intellij.util.text.StringSearcher;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -26,8 +27,8 @@ public class ShTextOccurrencesUtil {
       return StringUtil.isEmptyOrSpaces(subSequence) || StringUtil.contains(subSequence, "\n") ? null : textRange;
     }
     return SelectWordUtil.getWordSelectionRange(editor.getDocument().getImmutableCharSequence(),
-        caret.getOffset(),
-        ShTextOccurrencesUtil::isWordPartCondition);
+                                                caret.getOffset(),
+                                                ShTextOccurrencesUtil::isWordPartCondition);
   }
 
   private static boolean isWordPartCondition(char ch) {
@@ -38,7 +39,7 @@ public class ShTextOccurrencesUtil {
   public static Collection<TextRange> findAllOccurrences(@NotNull CharSequence documentText,
                                                          @NotNull CharSequence textToFind,
                                                          boolean matchExactWordsOnly) {
-    CollectConsumer<TextRange> consumer= new CollectConsumer<>();
+    CollectConsumer<TextRange> consumer = new CollectConsumer<>();
     consumeAllOccurrences(documentText, textToFind, matchExactWordsOnly, consumer);
     return consumer.getResult();
   }
@@ -47,14 +48,15 @@ public class ShTextOccurrencesUtil {
                                            @NotNull CharSequence textToFind,
                                            boolean matchExactWordsOnly,
                                            Consumer<? super TextRange> consumer) {
-    int offset = StringUtil.indexOf(documentText, textToFind);
-    while (offset >= 0) {
-      TextRange textRange = TextRange.create(offset, offset + textToFind.length());
-      if (!matchExactWordsOnly || !isWordExpandableOutside(documentText, textRange)) {
-        consumer.consume(textRange);
-      }
-      offset = StringUtil.indexOf(documentText, textToFind, offset + textToFind.length());
-    }
+    String pattern = textToFind.toString();
+    int length = pattern.length();
+    StringSearcher searcher = new StringSearcher(pattern, true, true);
+    searcher.processOccurrences(documentText, value -> {
+      TextRange tr = TextRange.create(value, value + length);
+      if (matchExactWordsOnly && isWordExpandableOutside(documentText, tr)) return true;
+      consumer.consume(tr);
+      return true;
+    });
   }
 
   private static boolean isWordExpandableOutside(@NotNull CharSequence documentText, @NotNull TextRange textRange) {