Index: System.Data.SQLite/SQLiteFunction.cs
==================================================================
--- System.Data.SQLite/SQLiteFunction.cs
+++ System.Data.SQLite/SQLiteFunction.cs
@@ -995,12 +995,17 @@
                 if (pr == null)
                     continue;
 
                 SQLiteFunction f = pair.Value;
 
-                if ((f == null) ||
-                    !UnbindFunction(sqlbase, pr, f, flags))
+                if ((f != null) &&
+                    UnbindFunction(sqlbase, pr, f, flags))
+                {
+                    /* IGNORED */
+                    sqlbase.Functions.Remove(pr);
+                }
+                else
                 {
                     result = false;
                 }
             }
         }