diff --git a/libsrc/atari/carthdr.s b/libsrc/atari/carthdr.s
index 52dc42053..3e4ea219c 100644
--- a/libsrc/atari/carthdr.s
+++ b/libsrc/atari/carthdr.s
@@ -10,7 +10,7 @@
 
 .include        "atari.inc"
 
-                .segment "CARTHDR"
+.segment        "CARTHDR"
 
                 .word   cartstart       ; start routine
                 .byte   0               ; must be zero