diff --git a/examples/asm/euclid/euclid.a65 b/examples/asm/euclid/euclid.ca65
similarity index 94%
rename from examples/asm/euclid/euclid.a65
rename to examples/asm/euclid/euclid.ca65
index 150847c..8e678c9 100644
--- a/examples/asm/euclid/euclid.a65
+++ b/examples/asm/euclid/euclid.ca65
@@ -1,4 +1,4 @@
-; euclid.a65
+; euclid.ca65
 ; A program to find the greatest common divisor of two numbers
 
 .ORG $1000
@@ -6,7 +6,7 @@
 ; .algo
 LDA $00    ; Load from F to A
 ; .algo_
-sec        ; Set carry flag
+SEC        ; Set carry flag
 SBC $01    ; Subtract S from the number in A (from F)
 BEQ end    ; Jump to .end if the difference is zero
 BMI swap   ; Jump to .swap if the difference is negative