diff --git a/lib/lcm.c b/lib/lcm.c
index b9c8de461e9e1630159b2edfd21a4ca49669a63c..01b3aa922dda39ee1eec7e37e285c1d1339ce910 100644
--- a/lib/lcm.c
+++ b/lib/lcm.c
@@ -7,7 +7,7 @@
 unsigned long lcm(unsigned long a, unsigned long b)
 {
 	if (a && b)
-		return (a * b) / gcd(a, b);
+		return (a / gcd(a, b)) * b;
 	else if (b)
 		return b;