diff --git a/docs/en/calculators/hyd_en_charge/lechapt-calmon.md b/docs/en/calculators/hyd_en_charge/lechapt-calmon.md
index 7d5e359e764771df843c054d49cb5808a9f08889..ee025f7132a3d3ac30521a69f5be9a834301c629 100644
--- a/docs/en/calculators/hyd_en_charge/lechapt-calmon.md
+++ b/docs/en/calculators/hyd_en_charge/lechapt-calmon.md
@@ -32,7 +32,7 @@ The correlation table of the coefficients is as follows:
 
 
 | Material                                       | ϵ (mm) | \(L\) | \(M\) | \(N\) |
-|------------------------------------------------|-------------:|----:|
+|------------------------------------------------|-------------:|----:|----:|-----:|
 | Uncoated cast iron or steel - Coarse concrete (corrosive water) | 2 | 1.863 | 2 | 5.33 |
 | Uncoated cast iron or steel - Coarse concrete (low corrosive water) | 1 | 1.601 | 1.975 | 5.25 |
 | Cast iron or steel with cement coating | 0.5 | 1.40 | 1.96 | 5.19 |