diff --git a/keypad.h b/keypad.h
index ce4d02f..aa004e7 100644
--- a/keypad.h
+++ b/keypad.h
@@ -53,8 +53,8 @@
 
 
 // do not change afters this
-#define KEYPAD_COLUMN_BITS ( ((2 << (KEYPAD_COLUMNS - 1)) - 1) << KEYPAD_COLUMN_FIRST_CHANNEL )
-#define KEYPAD_ROW_BITS ( ((2 << (KEYPAD_ROWS - 1)) - 1) << KEYPAD_ROW_FIRST_CHANNEL )
+#define KEYPAD_COLUMN_BITS ( ((1 << KEYPAD_COLUMNS) - 1) << KEYPAD_COLUMN_FIRST_CHANNEL )
+#define KEYPAD_ROW_BITS ( ((1 << KEYPAD_ROWS) - 1) << KEYPAD_ROW_FIRST_CHANNEL )
 //#define KEYPAD_COLUMN_BITS 0b11110000
 //#define KEYPAD_ROW_BITS 0b11111000