diff --git a/Doxyfile b/Doxyfile
index f5dbbb5..57c7f8a 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -502,7 +502,7 @@ LOOKUP_CACHE_SIZE      = 0
 # DOT_NUM_THREADS setting.
 # Minimum value: 0, maximum value: 32, default value: 1.
 
-NUM_PROC_THREADS       = 0
+NUM_PROC_THREADS       = 1 # Disable as it produces different lists on every run
 
 # If the TIMESTAMP tag is set different from NO then each generated page will
 # contain the date or date and time when the page was generated. Setting this to