diff --git a/src/main.c b/src/main.c
index b951e9a..a902480 100644
--- a/src/main.c
+++ b/src/main.c
@@ -53,9 +53,9 @@ static void vga_pixel_program_init(PIO pio, uint sm, uint offset)
 	pio_sm_set_enabled(pio, sm, true);
 }
 
-static void vga_sync_program_init(PIO pio, uint sm, uint offset)
+static void vga_hsync_program_init(PIO pio, uint sm, uint offset)
 {
-	pio_sm_config config = vga_sync_program_get_default_config(offset);
+	pio_sm_config config = vga_hsync_program_get_default_config(offset);
 	// destination pins for SET instructions
 	sm_config_set_set_pins(&config, 20, 2);
 	pio_gpio_init(pio, 20);
@@ -99,10 +99,10 @@ int main()
 	vga_pixel_program_init(pio, sm0, offset0);
 
 	// VGA sync program
-	uint offset1 = pio_add_program(pio, &vga_sync_program);
+	uint offset1 = pio_add_program(pio, &vga_hsync_program);
 	uint sm1 = pio_claim_unused_sm(pio, true);
 	printf("Starting VGA sync machine on %u...\n", sm1);
-	vga_sync_program_init(pio, sm1, offset1);
+	vga_hsync_program_init(pio, sm1, offset1);
 	printf("Feeding horizontal sync...\n");
 	pio_sm_put_blocking(pio, sm1, 63 * 4);
 	pio_sm_put_blocking(pio, sm1, 775 * 4);
diff --git a/src/vga.pio b/src/vga.pio
index 6f8876d..2a1c368 100644
--- a/src/vga.pio
+++ b/src/vga.pio
@@ -6,9 +6,9 @@ loop:
     out pins, 1 [2]
     jmp loop
 
-.program vga_sync
+.program vga_hsync
 
-entrypoint_vga_sync:
+entrypoint_vga_hsync:
     pull
     mov isr, osr
     pull