diff --git a/sample/sample-plugins/log/log_v3.c b/sample/sample-plugins/log/log_v3.c
index deae590..d2d44c7 100644
--- a/sample/sample-plugins/log/log_v3.c
+++ b/sample/sample-plugins/log/log_v3.c
@@ -91,7 +91,7 @@
     }
 
     /* Print some version information about the OpenVPN process using this plug-in */
-    printf("log_v3: OpenVPN %s  (Major: %i, Minor: %i, Patch: %s)\n", args->ovpn_version,
+    printf("log_v3: OpenVPN %s  (Major: %u, Minor: %u, Patch: %s)\n", args->ovpn_version,
            args->ovpn_version_major, args->ovpn_version_minor, args->ovpn_version_patch);
 
     /*  Which callbacks to intercept.  */
diff --git a/sample/sample-plugins/simple/base64.c b/sample/sample-plugins/simple/base64.c
index ab6aed8..3b11543 100644
--- a/sample/sample-plugins/simple/base64.c
+++ b/sample/sample-plugins/simple/base64.c
@@ -122,7 +122,7 @@
     ovpn_base64_decode = args->callbacks->plugin_base64_decode;
 
     /* Print some version information about the OpenVPN process using this plug-in */
-    ovpn_log(PLOG_NOTE, PLUGIN_NAME, "OpenVPN %s  (Major: %i, Minor: %i, Patch: %s)\n",
+    ovpn_log(PLOG_NOTE, PLUGIN_NAME, "OpenVPN %s  (Major: %u, Minor: %u, Patch: %s)\n",
              args->ovpn_version, args->ovpn_version_major, args->ovpn_version_minor,
              args->ovpn_version_patch);