diff --git a/Marlin/src/sd/cardreader.h b/Marlin/src/sd/cardreader.h
index 675c3adf4..42e35656f 100644
--- a/Marlin/src/sd/cardreader.h
+++ b/Marlin/src/sd/cardreader.h
@@ -247,9 +247,9 @@ private:
   #define IS_SD_INSERTED() Sd2Card::isInserted()
 #elif PIN_EXISTS(SD_DETECT)
   #if ENABLED(SD_DETECT_INVERTED)
-    #define IS_SD_INSERTED() (READ(SD_DETECT_PIN) == HIGH)
+    #define IS_SD_INSERTED()  READ(SD_DETECT_PIN)
   #else
-    #define IS_SD_INSERTED() (READ(SD_DETECT_PIN) == LOW)
+    #define IS_SD_INSERTED() !READ(SD_DETECT_PIN)
   #endif
 #else
   // No card detect line? Assume the card is inserted.