diff --git a/utils.cpp b/utils.cpp
index 4f59f6c..bfe924c 100644
--- a/utils.cpp
+++ b/utils.cpp
@@ -543,7 +543,7 @@
     if (rc <= 0)
     {
         log<level::ERR>("inet_pton failed:",
-                        entry("SUBNETMASK=%s", subnetMask));
+                        entry("SUBNETMASK=%s", subnetMask.c_str()));
         return 0;
     }
 
@@ -556,7 +556,7 @@
     else
     {
         log<level::ERR>("Invalid Mask",
-                        entry("SUBNETMASK=%s", subnetMask));
+                        entry("SUBNETMASK=%s", subnetMask.c_str()));
         return 0;
     }
 }