diff --git a/macros/apple-linux-convergence.S b/macros/apple-linux-convergence.S
index 8d283a7..f804854 100644
--- a/macros/apple-linux-convergence.S
+++ b/macros/apple-linux-convergence.S
@@ -119,10 +119,28 @@ main:
         ldr     \a, [sp], 16
 .endm
 
-.macro  MIN     src_a, src_b, dest
-        csel    \dest, \src_a, \src_b, GT
-.endm
+/*  The smaller of src_a and src_b is put into dest. A cmp instruction
+    or other instruction that sets the flags must be performed first.
+    This macro makes it easy to remember which register does what in the
+    csel.
+    
+    Thank you to u/TNorthover for nudge to add the cmp.
+*/
 
-.macro  MAX     src_a, src_b, dest
+.macro  MIN     src_a, src_b, dest
+        cmp     \src_a, \src_b
         csel    \dest, \src_a, \src_b, LT
 .endm
+
+/*  The larger of src_a and src_b is put into dest. A cmp instruction
+    or other instruction that sets the flags must be performed first.
+    This macro makes it easy to remember which register does what in the
+    csel.
+
+    Thank you to u/TNorthover for nudge to add the cmp.
+*/
+
+.macro  MAX     src_a, src_b, dest
+        cmp     \src_a, \src_b
+        csel    \dest, \src_a, \src_b, GT
+.endm