diff --git a/src/imath.asm b/src/imath.asm
index bf67a92..7a056da 100644
--- a/src/imath.asm
+++ b/src/imath.asm
@@ -1,7 +1,7 @@
 include errno
 
 ; (uint32_t, uint32_t) div(uint32_t, uint32_t);
-;   Divides two integers.
+;   Divides two unsigned 32 bit integers.
 ;
 ; Arguments:
 ; - r1: Dividend
@@ -9,6 +9,8 @@ include errno
 ; Results:
 ; - r1: Quotient
 ; - r2: Remainder
+; Clobbers:
+; - r1 - r4
 ; Errors:
 ; - `ERR_DIV_BY_ZERO`: The divisor was `0`.
 ;