diff --git a/src/ca65/instr.h b/src/ca65/instr.h
index 201f03802..ead36a0c2 100644
--- a/src/ca65/instr.h
+++ b/src/ca65/instr.h
@@ -84,7 +84,7 @@
 #define AM65_IMM_IMPLICIT       0x00800000UL
 #define AM65_BLOCKMOVE          0x01000000UL
 #define AM65_BLOCKXFER          0x02000000UL
-#define AM65_ABS_IND_LONG	    0x04000000UL
+#define AM65_ABS_IND_LONG       0x04000000UL
 
 /* Bitmask for all ZP operations that have correspondent ABS ops */
 #define AM65_SET_ZP     (AM65_DIR | AM65_DIR_X | AM65_DIR_Y | AM65_DIR_IND | AM65_DIR_X_IND)