diff --git a/src/Buffer.cpp b/src/Buffer.cpp
index b71c3fcd83..6343405b5c 100644
--- a/src/Buffer.cpp
+++ b/src/Buffer.cpp
@@ -2483,6 +2483,9 @@ void Buffer::clearBibFileCache() const
 
 void Buffer::reloadBibInfoCache() const
 {
+	if (isInternal())
+		return;
+
 	// use the master's cache
 	Buffer const * const tmp = masterBuffer();
 	if (tmp != this) {