diff --git a/doc/Doxygen/Doxyfile b/doc/Doxygen/Doxyfile
index 0dbf7f8081..940a1367eb 100644
--- a/doc/Doxygen/Doxyfile
+++ b/doc/Doxygen/Doxyfile
@@ -402,7 +402,7 @@ TYPEDEF_HIDES_STRUCT   = NO
 # the optimal cache size from a speed point of view.
 # Minimum value: 0, maximum value: 9, default value: 0.
 
-LOOKUP_CACHE_SIZE      = 0
+LOOKUP_CACHE_SIZE      = 3
 
 #---------------------------------------------------------------------------
 # Build related configuration options