diff --git a/userspace/libsinsp/ifinfo.cpp b/userspace/libsinsp/ifinfo.cpp
index 4587824425..fc58b1bbb0 100644
--- a/userspace/libsinsp/ifinfo.cpp
+++ b/userspace/libsinsp/ifinfo.cpp
@@ -69,7 +69,7 @@ std::string sinsp_ipv4_ifinfo::to_string() const
 	return std::string(s);
 }
 
-std::string sinsp_ipv4_ifinfo::addr_to_string(const uint32_t addr) const
+std::string sinsp_ipv4_ifinfo::addr_to_string(const uint32_t addr)
 {
 	char str_addr[16];
 	convert_to_string(str_addr, sizeof(str_addr), addr);
diff --git a/userspace/libsinsp/ifinfo.h b/userspace/libsinsp/ifinfo.h
index ed42dc399a..0968c3a281 100644
--- a/userspace/libsinsp/ifinfo.h
+++ b/userspace/libsinsp/ifinfo.h
@@ -41,7 +41,7 @@ class SINSP_PUBLIC sinsp_ipv4_ifinfo
 	sinsp_ipv4_ifinfo(uint32_t addr, uint32_t netmask, uint32_t bcast, const char* name);
 
 	std::string to_string() const;
-	std::string addr_to_string(const uint32_t addr) const;
+	static std::string addr_to_string(const uint32_t addr);
 	std::string addr_to_string() const;
 	std::string address() const;