1 files changed, 1 insertions, 0 deletions
diff --git a/platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/FileDocumentManagerImpl.java b/platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/FileDocumentManagerImpl.java
index 091ff1171157..cce6de27545d 100644
--- a/platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/FileDocumentManagerImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/FileDocumentManagerImpl.java
@@ -621,6 +621,7 @@ public class FileDocumentManagerImpl extends FileDocumentManager implements Virt
               DocumentEx documentEx = (DocumentEx)document;
               documentEx.setReadOnly(false);
               LoadTextUtil.setCharsetWasDetectedFromBytes(file, null);
+              file.setBOM(null); // reset BOM in case we had one and the external change stripped it away
               documentEx.replaceText(LoadTextUtil.loadText(file), file.getModificationStamp());
               documentEx.setReadOnly(!wasWritable);
             }