diff --git a/pio/st7789_lcd/st7789_lcd.c b/pio/st7789_lcd/st7789_lcd.c
index 26862c5be..f6724262b 100644
--- a/pio/st7789_lcd/st7789_lcd.c
+++ b/pio/st7789_lcd/st7789_lcd.c
@@ -28,6 +28,8 @@
 #define PIN_RESET 4
 #define PIN_BL 5
 
+#define SPI_CLOCK_POLARITY 0 // default to 0, some displays require polarity 1
+
 #define SERIAL_CLK_DIV 1.f
 
 #ifndef M_PI
@@ -90,7 +92,7 @@ int main() {
     PIO pio = pio0;
     uint sm = 0;
     uint offset = pio_add_program(pio, &st7789_lcd_program);
-    st7789_lcd_program_init(pio, sm, offset, PIN_DIN, PIN_CLK, SERIAL_CLK_DIV);
+    st7789_lcd_program_init(pio, sm, offset, SPI_CLOCK_POLARITY, PIN_DIN, PIN_CLK, SERIAL_CLK_DIV);
 
     gpio_init(PIN_CS);
     gpio_init(PIN_DC);
diff --git a/pio/st7789_lcd/st7789_lcd.pio b/pio/st7789_lcd/st7789_lcd.pio
index aa35c683f..165fc4b5c 100644
--- a/pio/st7789_lcd/st7789_lcd.pio
+++ b/pio/st7789_lcd/st7789_lcd.pio
@@ -22,7 +22,7 @@
 // but we are using a threshold of 8 here (consume 1 byte from each FIFO entry
 // and discard the remainder) to make things easier for software on the other side
 
-static inline void st7789_lcd_program_init(PIO pio, uint sm, uint offset, uint data_pin, uint clk_pin, float clk_div) {
+static inline void st7789_lcd_program_init(PIO pio, uint sm, uint offset, bool cpol, uint data_pin, uint clk_pin, float clk_div) {
     pio_gpio_init(pio, data_pin);
     pio_gpio_init(pio, clk_pin);
     pio_sm_set_consecutive_pindirs(pio, sm, data_pin, 1, true);
@@ -33,6 +33,11 @@ static inline void st7789_lcd_program_init(PIO pio, uint sm, uint offset, uint d
     sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
     sm_config_set_clkdiv(&c, clk_div);
     sm_config_set_out_shift(&c, false, true, 8);
+	
+    // The pin muxes can be configured to invert the output (among other things),
+    // and this is a cheesy way to allow changing polarity
+    gpio_set_outover(clk_pin, cpol ? GPIO_OVERRIDE_INVERT : GPIO_OVERRIDE_NORMAL);
+	
     pio_sm_init(pio, sm, offset, &c);
     pio_sm_set_enabled(pio, sm, true);
 }