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--- a/Makefile.am
+++ b/Makefile.am
@@ -59,7 +59,6 @@
      sc2src/log.h \
      sc2src/pathut.cpp \
      sc2src/pathut.h \
-     sc2src/ptmutex.h \
      sc2src/rcvqueue.h \
      sc2src/sc2mpd.cpp \
      sc2src/smallut.cpp \