diff --git a/src/vulkan/util/gen_enum_to_str.py b/src/vulkan/util/gen_enum_to_str.py
index 8ac8916435c..1f05aa34f93 100644
--- a/src/vulkan/util/gen_enum_to_str.py
+++ b/src/vulkan/util/gen_enum_to_str.py
@@ -457,7 +457,7 @@ def main():
     for template, file_ in [(C_TEMPLATE, os.path.join(args.outdir, 'vk_enum_to_str.c')),
                             (H_TEMPLATE, os.path.join(args.outdir, 'vk_enum_to_str.h')),
                             (H_DEFINE_TEMPLATE, os.path.join(args.outdir, 'vk_enum_defines.h'))]:
-        with open(file_, 'w') as f:
+        with open(file_, 'w', encoding='utf-8') as f:
             f.write(template.render(
                 file=os.path.basename(__file__),
                 enums=enums,
diff --git a/src/vulkan/util/vk_entrypoints_gen.py b/src/vulkan/util/vk_entrypoints_gen.py
index be80dc9d184..08d4e3ae857 100644
--- a/src/vulkan/util/vk_entrypoints_gen.py
+++ b/src/vulkan/util/vk_entrypoints_gen.py
@@ -236,10 +236,10 @@ def main():
     # For outputting entrypoints.h we generate a anv_EntryPoint() prototype
     # per entry point.
     try:
-        with open(args.out_h, 'w') as f:
+        with open(args.out_h, 'w', encoding='utf-8') as f:
             guard = os.path.basename(args.out_h).replace('.', '_').upper()
             f.write(TEMPLATE_H.render(guard=guard, **environment))
-        with open(args.out_c, 'w') as f:
+        with open(args.out_c, 'w', encoding='utf-8') as f:
             f.write(TEMPLATE_C.render(**environment))
 
     except Exception: