diff --git a/internal/lib/generate.go b/internal/lib/generate.go
index 483e309..663ebd9 100644
--- a/internal/lib/generate.go
+++ b/internal/lib/generate.go
@@ -27,6 +27,7 @@ func parseKeymap(file string) (*keymap.File, bool) {
 	log.Info().Msg("Parsing keymap file.")
 	r, err := os.Open(file)
 	if err != nil {
+		log.Err(err).Send()
 		return nil, false
 	}
 
@@ -34,6 +35,7 @@ func parseKeymap(file string) (*keymap.File, bool) {
 	defer r.Close()
 
 	if err != nil {
+		log.Err(err).Send()
 		return nil, false
 	}
 	return ast, true
diff --git a/pkg/keymap/parser.go b/pkg/keymap/parser.go
index 0351390..b48100d 100644
--- a/pkg/keymap/parser.go
+++ b/pkg/keymap/parser.go
@@ -16,6 +16,7 @@ type File struct {
 	Pos lexer.Position
 
 	Includes []*Include `parser:"@@+"`
+	Defines  []*Define  `parser:"@@*"`
 	Configs  []*Config  `parser:"@@"`
 	Device   *Device    `parser:"'/' '{' @@ '}'';'"`
 }
@@ -25,6 +26,11 @@ type Include struct {
 
 	Value string `parser:"'#'Ident'<'@((Ident ('-' Ident)? '/'?)* ('.' Ident))'>'"`
 }
+type Define struct {
+	Pos lexer.Position
+
+	Value string `parser:"'#'Ident @Ident (Ident|Int)"`
+}
 
 type Config struct {
 	Pos lexer.Position
@@ -81,7 +87,7 @@ type Layer struct {
 
 type List struct {
 	Number  *int32  `parser:"@Int"`
-	KeyCode *string `parser:"| @(Ident ('('Ident')')?)"`
+	KeyCode *string `parser:"| @(Ident('('Ident('('Ident')')?')')?)"`
 }
 
 type Behavior struct {
diff --git a/pkg/keymap/parser_test.go b/pkg/keymap/parser_test.go
index 47b7a3b..aabdb07 100644
--- a/pkg/keymap/parser_test.go
+++ b/pkg/keymap/parser_test.go
@@ -12,11 +12,11 @@ var keymapFile = `
 
 
 &mt {
-    //flavor = "tap-preferred";
-    //tapping_term_ms = <200>;
+    flavor = "tap-preferred";
+    tapping_term_ms = <200>;
 };
 
-/ { 
+/ {
 
     combos {
         compatible = "zmk,combos";
@@ -25,81 +25,81 @@ var keymapFile = `
             key-positions = <0 1>;
             bindings = <&kp ESC>;
         };
-        
+
          combo_tab {
             timeout-ms = <50>;
             key-positions = <10 11>;
             bindings = <&kp TAB>;
         };
-        
+
             combo_ralt {
             timeout-ms = <50>;
             key-positions = <17 16>;
             bindings = <&kp RALT>;
         };
-        
+
                     combo_lalt {
             timeout-ms = <50>;
             key-positions = <11 12>;
             bindings = <&kp LALT>;
         };
-        
+
                            combo_lgui {
             timeout-ms = <50>;
             key-positions = <12 13>;
             bindings = <&kp LGUI>;
         };
-        
-        
+
+
            combo_rgui {
             timeout-ms = <50>;
             key-positions = <17 18>;
             bindings = <&kp RGUI>;
         };
-        
 
-        
+
+
     };
 
         keymap {
                 compatible = "zmk,keymap";
-                
+
        		default_layer {
 		bindings = <
-		&kp Q &kp W &kp E &kp R &kp T 						&kp Y &kp U  &kp I    &kp O   &kp P 
+		&kp Q &kp W &kp E &kp R &kp T 						&kp Y &kp U  &kp I    &kp O   &kp P
 		&kp A &kp S &kp D &kp F &kp G 			        	        &kp H &kp J &kp K &kp L &kp QUOT
 		&mt LSFT Z &kp X &kp C &kp V &kp B				        &kp N &kp M  &kp CMMA &kp DOT &mt LSFT RET
-          				&mo 1 &kp LCTL  				&kp SPC &mo 2 
+          				&mo 1 &kp LCTL  				&kp SPC &mo 2
 		>;
 		};
 
        		left_layer {
 		bindings = <
-		&kp NUM_1  &kp NUM_2    &kp NUM_3    &kp NUM_4    &kp NUM_5		&kp NUM_6 &kp NUM_7 &kp NUM_8 &kp NUM_9 &kp NUM_0 
-		&kp TAB    &kp LC(S)    &kp DQT      &kp PIPE2     &kp HASH 		&kp MINUS &kp EQL  &kp LBKT &kp RBKT  &kp DEL 
-		&kp ESC    &kp TILDE 	&kp NON_US_BSLH &kp NON_US_HASH  &kp TILDE2 	&kp MINUS &kp GRAVE &kp LBKT &kp RBKT  &kp DEL 
-					    &mo 1  &kp LGUI  					&kp RGUI &mo 2 
+		&kp NUM_1  &kp NUM_2    &kp NUM_3    &kp NUM_4    &kp NUM_5		&kp NUM_6 &kp NUM_7 &kp NUM_8 &kp NUM_9 &kp NUM_0
+		&kp LC(LS(TAB))    &kp LC(S)    &kp DQT      &kp PIPE2     &kp HASH 		&kp MINUS &kp EQL  &kp LBKT &kp RBKT  &kp DEL
+		&kp ESC    &kp TILDE 	&kp NON_US_BSLH &kp NON_US_HASH  &kp TILDE2 	&kp MINUS &kp GRAVE &kp LBKT &kp RBKT  &kp DEL
+					    &mo 1  &kp LGUI  					&kp RGUI &mo 2
 		>;
 		};
-		
+
 		right_layer {
 		bindings = <
-		&kp BANG  &kp ATSN &kp HASH  &kp DLLR  &kp PRCT    			&kp CRRT  &kp AMPS &kp KMLT &kp LPRN &kp RPRN 
+		&kp BANG  &kp ATSN &kp HASH  &kp DLLR  &kp PRCT    			&kp CRRT  &kp AMPS &kp KMLT &kp LPRN &kp RPRN
 		&kp HASH  &kp QMARK  &kp FSLH  &kp COLN  &kp SCLN 			&kp MINUS &kp KP_EQUAL  &kp LBRC  &kp RBRC   &kp BKSP
 		&kp LSFT  &kp KPLS &kp LBKT &kp RBKT   &kp BSLH    			&kp UNDER &kp LEFT &kp DOWN &kp UP  &kp RIGHT
-					  &mo 3 &kp LCTL  				&kp SPC  &mo 2 
+					  &mo 3 &kp LCTL  				&kp SPC  &mo 2
 		>;
-		};	
-		
+		};
+
 		tri_layer {
 		bindings = <
 		&kp NUM_1  &kp NUM_2    &kp NUM_3    &kp NUM_4    &kp NUM_5 			&trans &trans   &trans   &trans  &trans
-		&kp F1 &kp F2 &kp F3 &kp F4 &kp F5  						&trans &kp PG_UP  &kp K_VOL_UP &kp K_MUTE &trans 
-		&bt BT_CLR  &bt BT_NXT &bt BT_PRV &kp F6 &kp F7   				&trans &kp PG_DN  &kp K_VOL_DN  &trans &trans   
-					 &trans &trans  					&trans &trans 
+		&kp F1 &kp F2 &kp F3 &kp F4 &kp F5  						&trans &kp PG_UP  &kp K_VOL_UP &kp K_MUTE &trans
+		&bt BT_CLR  &bt BT_NXT &bt BT_PRV &kp F6 &kp F7   				&trans &kp PG_DN  &kp K_VOL_DN  &trans &trans
+					 &trans &trans  					&trans &trans
 		>;
-		};	
-        
+		};
+
 	};
 };
 `