diff --git a/libnetutils/ifc_utils.c b/libnetutils/ifc_utils.c
index 6af49bb..4e73401 100644
--- a/libnetutils/ifc_utils.c
+++ b/libnetutils/ifc_utils.c
@@ -113,6 +113,10 @@
     if (ret == 0) {
         memcpy(ss, ai->ai_addr, ai->ai_addrlen);
         freeaddrinfo(ai);
+    } else {
+        // Getaddrinfo has its own error codes. Convert to negative errno.
+        // There, the only thing that can reasonably happen is that the passed-in string is invalid.
+        ret = (ret == EAI_SYSTEM) ? -errno : -EINVAL;
     }
 
     return ret;