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-rw-r--r--interface-ip.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/interface-ip.c b/interface-ip.c
index 587826a..8d4434b 100644
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -75,8 +75,8 @@ clear_if_addr(union if_addr *a, int mask)
uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
uint8_t *p = (uint8_t *) a;
- if (m_bytes < sizeof(a))
- memset(p + m_bytes, 0, sizeof(a) - m_bytes);
+ if (m_bytes < sizeof(*a))
+ memset(p + m_bytes, 0, sizeof(*a) - m_bytes);
p[m_bytes - 1] &= ~m_clear;
}