diff --git a/platform/util/src/com/intellij/openapi/util/text/Pluralizer.java b/platform/util/src/com/intellij/openapi/util/text/Pluralizer.java
index e041551c975d2..c6226a46557d2 100644
--- a/platform/util/src/com/intellij/openapi/util/text/Pluralizer.java
+++ b/platform/util/src/com/intellij/openapi/util/text/Pluralizer.java
@@ -83,7 +83,7 @@ static String restoreCase(String word, String result) {
       if (wc != lc && wc != uc) break;
       chars[i] = wc;
     }
-    if (i < chars.length) {
+    if (i > 0 && i < chars.length) {
       char wc = word.charAt(i - 1);
       char uc = Character.toUpperCase(wc);
       char lc = Character.toLowerCase(wc);