diff --git a/platform/util-rt/src/com/intellij/openapi/util/io/FileUtilRt.java b/platform/util-rt/src/com/intellij/openapi/util/io/FileUtilRt.java
index 5d37625e049e..ebf271c4bc8f 100644
--- a/platform/util-rt/src/com/intellij/openapi/util/io/FileUtilRt.java
+++ b/platform/util-rt/src/com/intellij/openapi/util/io/FileUtilRt.java
@@ -275,6 +275,7 @@ public class FileUtilRt {
 
   @NotNull
   public static File createTempFile(@NotNull String prefix, @NotNull String suffix, @NotNull File directory) throws IOException {
+    // normalize and use only the file name from the prefix
     prefix = new File(prefix).getName();
     File f;
     int i = 0;