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-rw-r--r--src/include/taler_amount_lib.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/taler_amount_lib.h b/src/include/taler_amount_lib.h
index 0a7111003..d0024a8a0 100644
--- a/src/include/taler_amount_lib.h
+++ b/src/include/taler_amount_lib.h
@@ -169,6 +169,9 @@ TALER_amount_ntoh (struct TALER_Amount *res,
* @param a1 first amount
* @param a2 second amount
* @return result of the comparison
+ * -1 if `a1 < a2`
+ * 1 if `a1 > a2`
+ * 0 if `a1 == a2`.
*/
int
TALER_amount_cmp (const struct TALER_Amount *a1,