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-rw-r--r--BuildTools/SCons/SConscript.boot2
1 files changed, 1 insertions, 1 deletions
diff --git a/BuildTools/SCons/SConscript.boot b/BuildTools/SCons/SConscript.boot
index d6977fe..917935d 100644
--- a/BuildTools/SCons/SConscript.boot
+++ b/BuildTools/SCons/SConscript.boot
@@ -180,7 +180,7 @@ if not env["assertions"] :
env.Append(CPPDEFINES = ["NDEBUG"])
if env["experimental"] :
- env.Append(CPPDEFINES = ["SWIFT_EXPERIMENTAL_FT"])
+ env.Append(CPPDEFINES = ["SWIFT_EXPERIMENTAL_FT", "SWIFT_EXPERIMENTAL_HISTORY"])
# If we build shared libs on AMD64, we need -fPIC.
# This should have no performance impact om AMD64