diff --git a/build-number.txt b/build-number.txt
index f5e47ed..68d5f38 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-552
+553
diff --git a/src/pinning.h b/src/pinning.h
index 7bda8cc..f352eb4 100644
--- a/src/pinning.h
+++ b/src/pinning.h
@@ -19,7 +19,6 @@
 // Port B
 #define PIN_THERMISTOR          0   // PB0  - Thermistor (ADC12_IN8)
 #define PIN_SD_SCK              1   // PB1  - SD card SCK
-#define PIN_SD_CARD_DETECT      2   // PB2  - SD card detect
 #define PIN_PAPER               3   // PB3  - Paper detect
 #define PIN_CAMERA_PCLK         4   // PB4  - Camera pixel clock (TIM3_CH1)
 #define PIN_CAMERA_HSYNC        5   // PB5  - Camera VSYNC (TIM3_CH2)