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-rw-r--r--src/util/amount.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/util/amount.c b/src/util/amount.c
index 0092c014e..c1142b077 100644
--- a/src/util/amount.c
+++ b/src/util/amount.c
@@ -38,7 +38,7 @@
/**
* Set @a a to "invalid".
*
- * @param a amount to set to invalid
+ * @param[out] a amount to set to invalid
*/
static void
invalidate (struct TALER_Amount *a)