diff --git a/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java b/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java
index fcc022ab026..594205c4cd2 100644
--- a/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java
+++ b/libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java
@@ -163,7 +163,7 @@ public class K2JSCompilerMojo extends KotlinCompileMojo {
                 k2jsArgs.verbose = verbose;
             }
             if (sources.size() > 0) {
-                k2jsArgs.sourceFiles = sources;
+                k2jsArgs.sourceFiles = sources.toArray(new String[sources.size()]);
             }
         }
         getLog().info("Compiling Kotlin src from " + arguments.getSrc() + " to JavaScript at: " + outputFile);