diff --git a/Marlin/src/HAL/RP2040/pinsDebug.h b/Marlin/src/HAL/RP2040/pinsDebug.h
index 8f58089fb1..a13df3a1a5 100644
--- a/Marlin/src/HAL/RP2040/pinsDebug.h
+++ b/Marlin/src/HAL/RP2040/pinsDebug.h
@@ -137,7 +137,7 @@ int8_t digital_pin_to_analog_pin(pin_t pin) {
 }
 
 bool isAnalogPin(const pin_t pin) {
-  return digital_pin_to_analog_pin(pin) != -1;
+  return digital_pin_to_analog_pin(pin) >= 0;
 }
 
 #define digitalRead_mod(A) extDigitalRead(A)  // must use Arduino pin numbers when doing reads
diff --git a/Marlin/src/HAL/SAMD21/pinsDebug.h b/Marlin/src/HAL/SAMD21/pinsDebug.h
index 387516aa79..14c2e66f89 100644
--- a/Marlin/src/HAL/SAMD21/pinsDebug.h
+++ b/Marlin/src/HAL/SAMD21/pinsDebug.h
@@ -50,7 +50,7 @@
 #define getPinByIndex(x) pin_array[x].pin
 #define getPinIsDigitalByIndex(x) pin_array[x].is_digital
 #define isValidPin(P) (P >= 0 && P < pin_t(NUMBER_PINS_TOTAL))
-#define isAnalogPin(P) (digitalPinToAnalogIndex(P) != -1)
+#define isAnalogPin(P) (digitalPinToAnalogIndex(P) >= 0)
 #define pwm_status(P) digitalPinHasPWM(P)
 #define MULTI_NAME_PAD 27 // space needed to be pretty if not first name assigned to a pin
 
diff --git a/Marlin/src/HAL/SAMD51/pinsDebug.h b/Marlin/src/HAL/SAMD51/pinsDebug.h
index 1518c615c9..21fd9da28a 100644
--- a/Marlin/src/HAL/SAMD51/pinsDebug.h
+++ b/Marlin/src/HAL/SAMD51/pinsDebug.h
@@ -50,7 +50,7 @@
 #define getPinByIndex(x) pin_array[x].pin
 #define getPinIsDigitalByIndex(x) pin_array[x].is_digital
 #define isValidPin(P) (P >= 0 && P < pin_t(NUMBER_PINS_TOTAL))
-#define isAnalogPin(P) (digitalPinToAnalogIndex(P) != -1)
+#define isAnalogPin(P) (digitalPinToAnalogIndex(P) >= 0)
 #define pwm_status(P) digitalPinHasPWM(P)
 #define MULTI_NAME_PAD 27 // space needed to be pretty if not first name assigned to a pin
 
diff --git a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
index 94e911dba1..3781c59abc 100644
--- a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
+++ b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
@@ -311,7 +311,7 @@ void MarlinUI::init_lcd() {
 
   #if ANY(MKS_12864OLED, MKS_12864OLED_SSD1306, FYSETC_242_OLED_12864, ZONESTAR_12864OLED, K3D_242_OLED_CONTROLLER)
 
-    #if defined(LCD_PINS_DC) && LCD_PINS_DC != -1
+    #if defined(LCD_PINS_DC) && LCD_PINS_DC >= 0
       #if IS_I2C_LCD
         I2C_TypeDef *i2cInstance1 = (I2C_TypeDef *)pinmap_peripheral(digitalPinToPinName(DOGLCD_SDA_PIN), PinMap_I2C_SDA);
         I2C_TypeDef *i2cInstance2 = (I2C_TypeDef *)pinmap_peripheral(digitalPinToPinName(DOGLCD_SCL_PIN), PinMap_I2C_SCL);
diff --git a/Marlin/src/lcd/dogm/marlinui_DOGM.h b/Marlin/src/lcd/dogm/marlinui_DOGM.h
index 36079f5d8c..33036bd6ff 100644
--- a/Marlin/src/lcd/dogm/marlinui_DOGM.h
+++ b/Marlin/src/lcd/dogm/marlinui_DOGM.h
@@ -105,7 +105,7 @@
   #define SMART_RAMPS MB(RAMPS_SMART_EFB, RAMPS_SMART_EEB, RAMPS_SMART_EFF, RAMPS_SMART_EEF, RAMPS_SMART_SF)
   #define U8G_CLASS U8GLIB_64128N_2X_HAL                        // 4 stripes (HW-SPI)
 
-  #if (SMART_RAMPS && defined(__SAM3X8E__)) || (defined(DOGLCD_SCK) && (DOGLCD_SCK != -1 && DOGLCD_SCK != SD_SCK_PIN)) || (defined(DOGLCD_MOSI) && (DOGLCD_MOSI != -1 && DOGLCD_MOSI != SD_MOSI_PIN))
+  #if (SMART_RAMPS && defined(__SAM3X8E__)) || (defined(DOGLCD_SCK) && (DOGLCD_SCK >= 0 && DOGLCD_SCK != SD_SCK_PIN)) || (defined(DOGLCD_MOSI) && (DOGLCD_MOSI >= 0 && DOGLCD_MOSI != SD_MOSI_PIN))
     #define DOGM_FORCE_SOFT_SPI                                 // SW-SPI
   #endif