diff --git a/Chapter 3 - Camera Projection.ipynb b/Chapter 3 - Camera Projection.ipynb
index 9523498..0129902 100644
--- a/Chapter 3 - Camera Projection.ipynb	
+++ b/Chapter 3 - Camera Projection.ipynb	
@@ -445,7 +445,7 @@
     "     [1]]\n",
     ")\n",
     "\n",
-    "# Project (Xw, Yw, Zw, 0) into cameras coordinate system\n",
+    "# Project (Xw, Yw, Zw, 1) into cameras coordinate system\n",
     "Pc = np.matmul(T, Pw)\n",
     "\n",
     "# Apply camera intrinsics to map (Xc, Yc, Zc) to p=(x, y, z)\n",