diff --git a/src/common.c b/src/common.c
index 50370da6..1c109ffc 100644
--- a/src/common.c
+++ b/src/common.c
@@ -266,7 +266,7 @@ int ip_cmp(const struct sockaddr_storage *s1, const struct sockaddr_storage *s2)
 
 /* returns an allocated string with the mask to apply for the prefix
  */
-char* ipv4_prefix_to_mask(void *pool, unsigned prefix)
+char* ipv4_prefix_to_strmask(void *pool, unsigned prefix)
 {
 	struct in_addr in;
 	char str[MAX_IP_STR];
@@ -604,7 +604,7 @@ int ip_route_sanity_check(void *pool, char **_route)
 	/* we are most likely in the xxx.xxx.xxx.xxx/prefix format */
 	prefix = atoi(p);
 
-	pstr = ipv4_prefix_to_mask(pool, prefix);
+	pstr = ipv4_prefix_to_strmask(pool, prefix);
 	if (pstr == NULL) {
 		fprintf(stderr, "cannot figure format of route '%s'\n", route);
 		return -1;
diff --git a/src/common.h b/src/common.h
index fa638a18..2ac6a4f3 100644
--- a/src/common.h
+++ b/src/common.h
@@ -49,7 +49,7 @@ ssize_t force_read(int sockfd, void *buf, size_t len);
 ssize_t force_read_timeout(int sockfd, void *buf, size_t len, unsigned sec);
 ssize_t recv_timeout(int sockfd, void *buf, size_t len, unsigned sec);
 int ip_cmp(const struct sockaddr_storage *s1, const struct sockaddr_storage *s2);
-char* ipv4_prefix_to_mask(void *pool, unsigned prefix);
+char* ipv4_prefix_to_strmask(void *pool, unsigned prefix);
 unsigned ipv6_prefix_to_mask(struct in6_addr *in6, unsigned prefix);
 inline static int valid_ipv6_prefix(unsigned prefix)
 {
diff --git a/src/config.c b/src/config.c
index 02c14184..1368e6e6 100644
--- a/src/config.c
+++ b/src/config.c
@@ -908,7 +908,7 @@ size_t urlfw_size = 0;
 	if (prefix4 == 0) {
 		READ_STRING("ipv4-netmask", config->network.ipv4_netmask);
 	} else {
-		config->network.ipv4_netmask = ipv4_prefix_to_mask(config, prefix4);
+		config->network.ipv4_netmask = ipv4_prefix_to_strmask(config, prefix4);
 	}
 
 	READ_STRING("ipv6-network", config->network.ipv6);