| Index: lib/src/dynamics/joints/mouse_joint.dart
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| diff --git a/lib/src/dynamics/joints/mouse_joint.dart b/lib/src/dynamics/joints/mouse_joint.dart
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| index 2955b0a4f90d4e7d668d6f1cfe64fa12262cd4bb..bace374bb548ea4cc27332145da16f4832e9ff3d 100644
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| --- a/lib/src/dynamics/joints/mouse_joint.dart
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| +++ b/lib/src/dynamics/joints/mouse_joint.dart
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| @@ -137,8 +137,7 @@ class MouseJoint extends Joint {
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|      Vector2 temp = pool.popVec2();
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|  
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|      // Compute the effective mass matrix.
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| -    Rot.mulToOutUnsafe(
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| -        qB, temp.setFrom(_localAnchorB).sub(_localCenterB), _rB);
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| +    Rot.mulToOutUnsafe(qB, temp.setFrom(_localAnchorB).sub(_localCenterB), _rB);
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|  
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|      // K = [(1/m1 + 1/m2) * eye(2) - skew(r1) * invI1 * skew(r1) - skew(r2) * invI2 * skew(r2)]
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|      // = [1/m1+1/m2 0 ] + invI1 * [r1.y*r1.y -r1.x*r1.y] + invI2 * [r1.y*r1.y -r1.x*r1.y]
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| 
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