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-rw-r--r--src/engine/SCons/compat/__init__.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/engine/SCons/compat/__init__.py b/src/engine/SCons/compat/__init__.py
index 9a911f7..c6c7214 100644
--- a/src/engine/SCons/compat/__init__.py
+++ b/src/engine/SCons/compat/__init__.py
@@ -91,7 +91,8 @@ rename_module('pickle', 'cPickle')
# Default pickle protocol. Higher protocols are more efficient/featureful
# but incompatible with older Python versions. On Python 2.7 this is 2.
# Negative numbers choose the highest available protocol.
-PICKLE_PROTOCOL=-1
+import pickle
+PICKLE_PROTOCOL=pickle.HIGHEST_PROTOCOL
# TODO: FIXME
# In 3.x, 'profile' automatically loads the fast version if available.