diff --git a/src/CLI.cpp b/src/CLI.cpp
index f0f53d34a..235930e66 100644
--- a/src/CLI.cpp
+++ b/src/CLI.cpp
@@ -305,13 +305,14 @@ void CLI::analyze ()
   findOverrides ();
   categorize ();
 
-  // Remove all the syntactic sugar for FILTERs..
+  // Remove all the syntactic sugar for FILTERs.
   desugarTags ();
   desugarAttributes ();
   desugarAttributeModifiers ();
   desugarPatterns ();
   desugarIDs ();
   desugarUUIDs ();
+  insertJunctions ();
 
   // Decompose the elements for MODIFICATIONs.
   decomposeModAttributes ();
@@ -1190,6 +1191,71 @@ void CLI::desugarUUIDs ()
   _args = reconstructed;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Two consecutive FILTER, ID or UUID arguments:
+//
+//  ID ID             --> ID or ID
+//  ID UUID           --> ID or UUID
+//  UUID ID           --> UUID or ID
+//  UUID UUID         --> UUID or UUID
+//
+// Two consecutive FILTER, non-OP arguments that are not "(" or ")" need an
+// "and" operator inserted between them.
+//
+//   ) <non-op>         -->  ) and <non-op>
+//   <non-op> (         -->  <non-op> <and> (
+//   ) (                -->  ) and (
+//   <non-op> <non-op>  -->  <non-op> and <non-op>
+//
+void CLI::insertJunctions ()
+{
+  std::vector <A> reconstructed;
+  std::vector <A>::iterator prev = _args.begin ();
+  std::vector <A>::iterator a;
+  for (a = _args.begin (); a != _args.end (); ++a)
+  {
+    if (a->hasTag ("FILTER"))
+    {
+      // The prev iterator should be the first FILTER arg.
+      if (prev == _args.begin ())
+        prev = a;
+
+      // Insert OR between consecutive FILTER ID/UUID args.
+      if (a != prev &&
+          (prev->hasTag ("ID") || prev->hasTag ("UUID")) &&
+          (a->hasTag ("ID") || a->hasTag ("UUID")))
+      {
+        A opOr ("argOp", "or");
+        opOr.tag ("FILTER");
+        opOr.tag ("OP");
+        reconstructed.push_back (opOr);
+      }
+
+      // Insert AND between terms.
+      else if (a != prev)
+      {
+        if ((! prev->hasTag ("OP")          && a->attribute ("raw") == "(") ||
+            (! prev->hasTag ("OP")          && ! a->hasTag ("OP"))          ||
+            (prev->attribute ("raw") == ")" && ! a->hasTag ("OP"))          ||
+            (prev->attribute ("raw") == ")" && a->attribute ("raw") == "("))
+        {
+          A opOr ("argOp", "and");
+          opOr.tag ("FILTER");
+          opOr.tag ("OP");
+          reconstructed.push_back (opOr);
+        }
+      }
+
+      // Previous FILTER arg.
+      prev = a;
+    }
+
+    reconstructed.push_back (*a);
+  }
+
+  _args = reconstructed;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void CLI::decomposeModAttributes ()
 {
diff --git a/src/CLI.h b/src/CLI.h
index 57b55bbb8..ffcae07eb 100644
--- a/src/CLI.h
+++ b/src/CLI.h
@@ -86,6 +86,7 @@ private:
   void desugarPatterns ();
   void desugarIDs ();
   void desugarUUIDs ();
+  void insertJunctions ();
   void decomposeModAttributes ();
   void decomposeModAttributeModifiers ();
   void decomposeModTags ();