diff --git a/bullet.pc.cmake b/bullet.pc.cmake
index c5649d58d..a504b1fc4 100644
--- a/bullet.pc.cmake
+++ b/bullet.pc.cmake
@@ -2,5 +2,5 @@ Name: bullet
 Description: Bullet Continuous Collision Detection and Physics Library
 Requires:
 Version: @BULLET_VERSION@
-Libs: -L@LIB_DESTINATION@ -lBulletSoftBody -lBulletDynamics -lBulletCollision -lLinearMath
-Cflags: @BULLET_DOUBLE_DEF@ -I@INCLUDE_INSTALL_DIR@
+Libs: -L@CMAKE_INSTALL_PREFIX@/@LIB_DESTINATION@ -lBulletSoftBody -lBulletDynamics -lBulletCollision -lLinearMath
+Cflags: @BULLET_DOUBLE_DEF@ -I@CMAKE_INSTALL_PREFIX@/@INCLUDE_INSTALL_DIR@
diff --git a/src/Bullet3Common/b3Vector3.h b/src/Bullet3Common/b3Vector3.h
index ed45ffaa9..9bd10a5cc 100644
--- a/src/Bullet3Common/b3Vector3.h
+++ b/src/Bullet3Common/b3Vector3.h
@@ -467,10 +467,10 @@ public:
 		__m128 tmp3 = _mm_add_ps(r0,r1);
 		mVec128 = tmp3;
 #elif defined(B3_USE_NEON)
-		mVec128 = vsubq_f32(v1.mVec128, v0.mVec128);
-		mVec128 = vmulq_n_f32(mVec128, rt);
-		mVec128 = vaddq_f32(mVec128, v0.mVec128);
-#else	
+		float32x4_t vl = vsubq_f32(v1.mVec128, v0.mVec128);
+		vl = vmulq_n_f32(vl, rt);
+		mVec128 = vaddq_f32(vl, v0.mVec128);
+#else
 		b3Scalar s = b3Scalar(1.0) - rt;
 		m_floats[0] = s * v0.m_floats[0] + rt * v1.m_floats[0];
 		m_floats[1] = s * v0.m_floats[1] + rt * v1.m_floats[1];
diff --git a/src/LinearMath/btVector3.h b/src/LinearMath/btVector3.h
index 112b70dd6..839b19c14 100644
--- a/src/LinearMath/btVector3.h
+++ b/src/LinearMath/btVector3.h
@@ -501,10 +501,10 @@ public:
 		__m128 tmp3 = _mm_add_ps(r0,r1);
 		mVec128 = tmp3;
 #elif defined(BT_USE_NEON)
-		mVec128 = vsubq_f32(v1.mVec128, v0.mVec128);
-		mVec128 = vmulq_n_f32(mVec128, rt);
-		mVec128 = vaddq_f32(mVec128, v0.mVec128);
-#else	
+		float32x4_t vl = vsubq_f32(v1.mVec128, v0.mVec128);
+		vl = vmulq_n_f32(vl, rt);
+		mVec128 = vaddq_f32(vl, v0.mVec128);
+#else
 		btScalar s = btScalar(1.0) - rt;
 		m_floats[0] = s * v0.m_floats[0] + rt * v1.m_floats[0];
 		m_floats[1] = s * v0.m_floats[1] + rt * v1.m_floats[1];
diff --git a/test/Bullet2/Source/Tests/Test_v3interp.cpp b/test/Bullet2/Source/Tests/Test_v3interp.cpp
index b03377597..33d47db02 100644
--- a/test/Bullet2/Source/Tests/Test_v3interp.cpp
+++ b/test/Bullet2/Source/Tests/Test_v3interp.cpp
@@ -62,7 +62,9 @@ int Test_v3interp(void)
         v2.setW(w);
 
         correct_res = v3interp_ref(correct_res, v1, v2, rt);
-		test_res.setInterpolate3(v1, v2, rt);
+        //test self-referencing vector, see issue https://github.com/bulletphysics/bullet3/pull/313
+		test_res = v1;
+		test_res.setInterpolate3(test_res, v2, rt);
 	   
 		if( fabs(correct_res.m_floats[0] - test_res.m_floats[0]) +  
 			fabs(correct_res.m_floats[1] - test_res.m_floats[1]) +