diff --git a/example/java/CMakeLists.txt b/example/java/CMakeLists.txt
index 602a5fa99..2c685a774 100644
--- a/example/java/CMakeLists.txt
+++ b/example/java/CMakeLists.txt
@@ -65,7 +65,7 @@ add_custom_target(build_java
 )
 
 add_custom_target(generate_javadoc
-  COMMAND ${Java_JAVADOC_EXECUTABLE} -encoding UTF-8 -d ${JAVA_OUTPUT_DIRECTORY}/../docs org.drinkless.tdlib
+  COMMAND ${Java_JAVADOC_EXECUTABLE} -encoding UTF-8 -charset UTF-8 -d ${JAVA_OUTPUT_DIRECTORY}/../docs org.drinkless.tdlib
   WORKING_DIRECTORY ${TD_API_JAVA_PATH}
   COMMENT "Generating Javadoc documentation"
   DEPENDS td_generate_java_api