diff --git a/queries/highlights.scm b/queries/highlights.scm
index be0dfd5..628eea6 100644
--- a/queries/highlights.scm
+++ b/queries/highlights.scm
@@ -48,6 +48,18 @@
 ] @punctuation.bracket
 ; }}}
 
+; Functions {{{
+(function_call
+  function: (identifier) @function)
+(function_declaration
+  name: (identifier) @function)
+(primitive_declaration
+  name: (identifier) @function)
+
+(parameters
+  name: (identifier) @variable.parameter)
+; }}}
+
 ; Misc {{{
 (comment) @comment
 
diff --git a/test/highlight/functions.tig b/test/highlight/functions.tig
new file mode 100644
index 0000000..802f394
--- /dev/null
+++ b/test/highlight/functions.tig
@@ -0,0 +1,8 @@
+primitive print(s: string)
+/*        ^ function */
+/*              ^ variable.parameter */
+
+function func(a: int) : int = (print("Hello World!"); a)
+/*       ^ function */
+/*            ^ variable.parameter */
+/*                             ^ function */
diff --git a/test/highlight/identifiers.tig b/test/highlight/identifiers.tig
index eb43bf9..8a4bfef 100644
--- a/test/highlight/identifiers.tig
+++ b/test/highlight/identifiers.tig
@@ -22,8 +22,8 @@ var array := int_array[12] of 27;
 /*           ^ type */
 
 primitive func(a: int, b: string) : array
-/*             ^ variable */
+/*             ^ variable.parameter */
 /*                ^ type */
-/*                     ^ variable */
+/*                     ^ variable.parameter */
 /*                        ^ type */
 /*                                  ^ type */