diff --git a/src/lib/net/address.h b/src/lib/net/address.h
index f1c2233103..186f1fe86a 100644
--- a/src/lib/net/address.h
+++ b/src/lib/net/address.h
@@ -221,7 +221,7 @@ char *tor_addr_to_str_dup(const tor_addr_t *addr) ATTR_MALLOC;
 
 const char *fmt_addr_impl(const tor_addr_t *addr, int decorate);
 const char *fmt_addrport(const tor_addr_t *addr, uint16_t port);
-const char * fmt_addr32(uint32_t addr);
+const char *fmt_addr32(uint32_t addr);
 
 MOCK_DECL(int,get_interface_address6,(int severity, sa_family_t family,
 tor_addr_t *addr));