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-rw-r--r--SCons/Tool/jar.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/SCons/Tool/jar.py b/SCons/Tool/jar.py
index ae44ff3bd..1967294f0 100644
--- a/SCons/Tool/jar.py
+++ b/SCons/Tool/jar.py
@@ -240,7 +240,7 @@ def generate(env) -> None:
env['JARCOM'] = "${TEMPFILE('$_JARCOM','$JARCOMSTR')}"
env['JARSUFFIX'] = '.jar'
-def exists(env):
+def exists(env) -> bool:
# As reported by Jan Nijtmans in issue #2730, the simple
# return env.Detect('jar')
# doesn't always work during initialization. For now, we