diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/DefaultErrorMessages.java b/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/DefaultErrorMessages.java
index 2d849d4cd83..44a79a3b0c8 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/DefaultErrorMessages.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/DefaultErrorMessages.java
@@ -95,7 +95,7 @@ public class DefaultErrorMessages {
         MAP.put(CANNOT_BE_IMPORTED, "Cannot import ''{0}'', functions and properties can be imported only from packages", NAME);
         MAP.put(USELESS_HIDDEN_IMPORT, "Useless import, it is hidden further");
         MAP.put(USELESS_SIMPLE_IMPORT, "Useless import, does nothing");
-        MAP.put(PLATFORM_CLASS_MAPPED_TO_KOTLIN, "This class shouldn't be used in Kotlin. Use {0} instead.", CLASS_DESCRIPTOR_LIST);
+        MAP.put(PLATFORM_CLASS_MAPPED_TO_KOTLIN, "This class shouldn''t be used in Kotlin. Use {0} instead.", CLASS_DESCRIPTOR_LIST);
 
         MAP.put(CANNOT_INFER_PARAMETER_TYPE,
                 "Cannot infer a type for this parameter. To specify it explicitly use the {(p : Type) => ...} notation");