diff --git a/examples/maven/hello-world/pom.xml b/examples/maven/hello-world/pom.xml
index ddc405f00d8..1e059485357 100644
--- a/examples/maven/hello-world/pom.xml
+++ b/examples/maven/hello-world/pom.xml
@@ -12,6 +12,8 @@
     <properties>
         <kotlin.version>1.0-SNAPSHOT</kotlin.version>
         <junit.version>4.10</junit.version>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>
diff --git a/examples/maven/mixed-code-hello-world/pom.xml b/examples/maven/mixed-code-hello-world/pom.xml
index 14ba639fbba..4e2c9d89cb6 100644
--- a/examples/maven/mixed-code-hello-world/pom.xml
+++ b/examples/maven/mixed-code-hello-world/pom.xml
@@ -12,6 +12,8 @@
     <properties>
         <kotlin.version>1.0-SNAPSHOT</kotlin.version>
         <junit.version>4.10</junit.version>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>