diff --git a/intern/cycles/kernel/geom/geom_motion_curve.h b/intern/cycles/kernel/geom/geom_motion_curve.h
index 80b33fad68b..dc1388b6643 100644
--- a/intern/cycles/kernel/geom/geom_motion_curve.h
+++ b/intern/cycles/kernel/geom/geom_motion_curve.h
@@ -50,12 +50,12 @@ ccl_device_inline int find_attribute_curve_motion(KernelGlobals *kg, int object,
 ccl_device_inline void motion_curve_keys_for_step(KernelGlobals *kg, int offset, int numkeys, int numsteps, int step, int k0, int k1, float4 keys[2])
 {
 	if(step == numsteps) {
-		/* center step: regular vertex location */
+		/* center step: regular key location */
 		keys[0] = kernel_tex_fetch(__curve_keys, k0);
 		keys[1] = kernel_tex_fetch(__curve_keys, k1);
 	}
 	else {
-		/* center step not stored in this array */
+		/* center step is not stored in this array */
 		if(step > numsteps)
 			step--;
 
@@ -97,14 +97,14 @@ ccl_device_inline void motion_curve_keys(KernelGlobals *kg, int object, int prim
 ccl_device_inline void motion_cardinal_curve_keys_for_step(KernelGlobals *kg, int offset, int numkeys, int numsteps, int step, int k0, int k1, int k2, int k3, float4 keys[4])
 {
 	if(step == numsteps) {
-		/* center step: regular vertex location */
+		/* center step: regular key location */
 		keys[0] = kernel_tex_fetch(__curve_keys, k0);
 		keys[1] = kernel_tex_fetch(__curve_keys, k1);
 		keys[2] = kernel_tex_fetch(__curve_keys, k2);
 		keys[3] = kernel_tex_fetch(__curve_keys, k3);
 	}
 	else {
-		/* center step not store in this array */
+		/* center step is not stored in this array */
 		if(step > numsteps)
 			step--;
 
diff --git a/intern/cycles/kernel/geom/geom_motion_triangle.h b/intern/cycles/kernel/geom/geom_motion_triangle.h
index 538c332c63a..4fc68a2fb4d 100644
--- a/intern/cycles/kernel/geom/geom_motion_triangle.h
+++ b/intern/cycles/kernel/geom/geom_motion_triangle.h
@@ -76,7 +76,7 @@ ccl_device_inline void motion_triangle_normals_for_step(KernelGlobals *kg, uint4
 		normals[2] = float4_to_float3(kernel_tex_fetch(__tri_vnormal, tri_vindex.z));
 	}
 	else {
-		/* center step not stored in this array */
+		/* center step is not stored in this array */
 		if(step > numsteps)
 			step--;
 
diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp
index 25d220562ea..496ab1ed2ca 100644
--- a/intern/cycles/render/mesh.cpp
+++ b/intern/cycles/render/mesh.cpp
@@ -63,8 +63,18 @@ void Mesh::Triangle::motion_verts(const float3 *verts,
 	/* Fetch vertex coordinates. */
 	float3 curr_verts[3];
 	float3 next_verts[3];
-	verts_for_step(verts, vert_steps, num_verts, num_steps, step, curr_verts);
-	verts_for_step(verts, vert_steps, num_verts, num_steps, step + 1, next_verts);
+	verts_for_step(verts,
+	               vert_steps,
+	               num_verts,
+	               num_steps,
+	               step,
+	               curr_verts);
+	verts_for_step(verts,
+	               vert_steps,
+	               num_verts,
+	               num_steps,
+	               step + 1,
+	               next_verts);
 	/* Interpolate between steps. */
 	r_verts[0] = (1.0f - t)*curr_verts[0] + t*next_verts[0];
 	r_verts[1] = (1.0f - t)*curr_verts[1] + t*next_verts[1];