diff --git a/src/2_debye_model.md b/src/2_debye_model.md
index f2cc05a2f3a58cd72229821b2368e1cf7cd45700..6f9acd3bb09daa91bd4e19d5008ee8d84bf2eb5e 100644
--- a/src/2_debye_model.md
+++ b/src/2_debye_model.md
@@ -150,7 +150,7 @@ There is therefore exactly one allowed ${\bf k}$ per volume $\left(\frac{2\pi}{L
 
 When we consider larger and larger box sizes $L→∞$, the volume per allowed mode becomes smaller and smaller, and eventually we obtain an integral:
 $$
-\sum_\mathbf{k}  \rightarrow \frac{L^3}{(2\pi)^3}\iiint\limits_{-∞}^{∞}dk_x dk_y dk_z )
+\sum_\mathbf{k}  \rightarrow \frac{L^3}{(2\pi)^3}\iiint\limits_{-∞}^{∞}dk_x dk_y dk_z
 $$