diff --git a/configure.ac b/configure.ac
index 8dde76a08..c635daf36 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ AC_PREREQ([2.54])
 #----------------------------------------------------------------------------
 AC_INIT(
     [bullet],
-    [2.72],
+    [2.73],
     [bullet@erwincoumans.com])
 AC_CANONICAL_HOST
 CS_PACKAGEINFO(
diff --git a/src/Makefile.am b/src/Makefile.am
index c6708f3d5..3bda6d975 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -258,6 +258,8 @@ libbulletsoftbody_a_SOURCES = \
 		BulletSoftBody/btSoftRigidDynamicsWorld.h \
 		BulletSoftBody/btSoftBodyHelpers.h
 
+
+libbulletmultithreaded_a_CXXFLAGS = ${CXXFLAGS} -I./BulletMultiThreaded/vectormath/scalar/cpp
 libbulletmultithreaded_a_SOURCES =\
                 BulletMultiThreaded/SpuCollisionObjectWrapper.cpp \
                 BulletMultiThreaded/SpuSampleTask/SpuSampleTask.cpp \