diff --git a/external/astyle/CMakeLists.txt b/external/astyle/CMakeLists.txt
index 537b2b7f453..178a76bd945 100644
--- a/external/astyle/CMakeLists.txt
+++ b/external/astyle/CMakeLists.txt
@@ -12,4 +12,7 @@ if(NOT MSVC)
   set_source_files_properties(${ASTYLE_SRCS} PROPERTIES COMPILE_FLAGS -w)
 endif()
 add_executable(qgisstyle ${ASTYLE_SRCS})
-set_target_properties(qgisstyle PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/scripts)
+set_target_properties(qgisstyle PROPERTIES
+  CXX_STANDARD 17
+  RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/scripts
+)