diff --git a/autospec/buildpattern.py b/autospec/buildpattern.py
index 460d0c2..562a530 100644
--- a/autospec/buildpattern.py
+++ b/autospec/buildpattern.py
@@ -105,7 +105,7 @@ def write_variables(file):
         file.write_strip("export CXXFLAGS=$CFLAGS\n")
         file.write_strip("unset LDFLAGS\n")
     if config.optimize_speed:
-        flags.extend(["-O3", "-flto", "-fno-semantic-interposition", "-falign-functions=32"])
+        flags.extend(["-O3", "-fno-semantic-interposition", "-falign-functions=32"])
         file.write_strip("export AR=gcc-ar\n")
         file.write_strip("export RANLIB=gcc-ranlib\n")
         file.write_strip("export NM=gcc-nm\n")