diff --git a/samples/libcurl/src/main/kotlin/org/konan/libcurl/CUrl.kt b/samples/libcurl/src/main/kotlin/org/konan/libcurl/CUrl.kt
index a88a3e562d7..7fee60f2965 100644
--- a/samples/libcurl/src/main/kotlin/org/konan/libcurl/CUrl.kt
+++ b/samples/libcurl/src/main/kotlin/org/konan/libcurl/CUrl.kt
@@ -30,7 +30,7 @@ class CUrl(val url: String)  {
     fun fetch() {
         val res = curl_easy_perform(curl)
         if (res != CURLE_OK)
-            println("curl_easy_perform() failed: ${curl_easy_strerror(res)}")
+            println("curl_easy_perform() failed: ${curl_easy_strerror(res)?.toKString()}")
     }
 
     fun close() {