diff --git a/src/signature.js b/src/signature.js
index d0eb4e41..69066d49 100644
--- a/src/signature.js
+++ b/src/signature.js
@@ -248,11 +248,20 @@ const signature = (() => {
                                     };
                                 }
                             } else {
-                                validatedArgs.push(arg);
-                                argIndex++;
+                                //validatedArgs.push(arg);
+                                //argIndex++;
+                                validatedArgs.push(undefined);
                             }
+                        } else if (match.length > 1 && param.type !== 'a') { // may have matched multiple args (if the regex ends with a '+')
+                            //the signature should have been like 'n+' - we still pack multiple args into array
+                            var argsAsArray = [];
+                            match.split('').forEach(function () {
+                                arg = args[argIndex];
+                                argsAsArray.push(arg);
+                                argIndex++;
+                            });
+                            validatedArgs.push(argsAsArray);
                         } else {
-                            // may have matched multiple args (if the regex ends with a '+')
                             // split into single tokens
                             match.split('').forEach(function (single) {
                                 arg = args[argIndex];
diff --git a/test/test-suite/groups/function-signatures/case035.json b/test/test-suite/groups/function-signatures/case035.json
index d2a1a5c8..c0a03b74 100644
--- a/test/test-suite/groups/function-signatures/case035.json
+++ b/test/test-suite/groups/function-signatures/case035.json
@@ -3,7 +3,7 @@
     "dataset": null,
     "bindings": {},
     "result": {
-        "$arg1": 1,
-        "$arg2": 2
+        "$arg1": [1, 2],
+        "$arg2": 3
     }
 }
\ No newline at end of file
diff --git a/test/test-suite/groups/function-signatures/case040.json b/test/test-suite/groups/function-signatures/case040.json
index 25199bd4..208d9e6f 100644
--- a/test/test-suite/groups/function-signatures/case040.json
+++ b/test/test-suite/groups/function-signatures/case040.json
@@ -2,5 +2,5 @@
     "expr": "λ($arg1, $arg2)<s?n+:a<n>>{[$arg1, $arg2]}(1, 2, 3)",
     "dataset": null,
     "bindings": {},
-    "result": [1, 2]
+    "result": [1, 2, 3]
 }
\ No newline at end of file
diff --git a/test/test-suite/groups/function-signatures/case041.json b/test/test-suite/groups/function-signatures/case041.json
new file mode 100644
index 00000000..119dc92e
--- /dev/null
+++ b/test/test-suite/groups/function-signatures/case041.json
@@ -0,0 +1,6 @@
+{
+    "expr": "λ($arg1, $arg2)<s?n+:o>{{\"arg1\": $arg1, \"arg2\": $arg2}}(1, 2, 3)",
+    "dataset": null,
+    "bindings": {},
+    "result": {"arg2": [1, 2, 3]}
+}
\ No newline at end of file
diff --git a/test/test-suite/groups/function-signatures/case042.json b/test/test-suite/groups/function-signatures/case042.json
new file mode 100644
index 00000000..3577fc41
--- /dev/null
+++ b/test/test-suite/groups/function-signatures/case042.json
@@ -0,0 +1,6 @@
+{
+    "expr": "λ($arg1, $arg2)<s?n+:a<n>>{[$arg1, $arg2]}(\"1\", 2, 3)",
+    "dataset": null,
+    "bindings": {},
+    "result": ["1", 2, 3]
+}
\ No newline at end of file
diff --git a/test/test-suite/groups/function-signatures/case043.json b/test/test-suite/groups/function-signatures/case043.json
new file mode 100644
index 00000000..4c55d42f
--- /dev/null
+++ b/test/test-suite/groups/function-signatures/case043.json
@@ -0,0 +1,9 @@
+{
+    "expr": "λ($arg1, $arg2)<s?n+:o>{{\"arg1\": $arg1, \"arg2\": $arg2}}(\"1\", 2, 3)",
+    "dataset": null,
+    "bindings": {},
+    "result": {
+		"arg1": "1", 
+		"arg2": [2, 3]
+	}
+}
\ No newline at end of file
diff --git a/test/test-suite/groups/function-signatures/case044.json b/test/test-suite/groups/function-signatures/case044.json
new file mode 100644
index 00000000..3259763c
--- /dev/null
+++ b/test/test-suite/groups/function-signatures/case044.json
@@ -0,0 +1,6 @@
+{
+    "expr": "λ($arg1, $arg2)<s?n?:o>{{\"arg1\": $arg1, \"arg2\": $arg2}}(2)",
+    "dataset": null,
+    "bindings": {},
+    "result": {"arg2": 2}
+}
\ No newline at end of file