diff --git a/src/analysis/TetrahedronGaussQuadrature.cpp b/src/analysis/TetrahedronGaussQuadrature.cpp
index 07270081bfa77165e301cf4803907e17a725b9aa..b868ab8837aad6a5a81c64f2ffdf21ae1cfccbd5 100644
--- a/src/analysis/TetrahedronGaussQuadrature.cpp
+++ b/src/analysis/TetrahedronGaussQuadrature.cpp
@@ -53,7 +53,7 @@ TetrahedronGaussQuadrature::_buildPointAndWeightLists()
         break;
       }
       case 3: {
-        Assert(lambda_list.size() == 2);
+        Assert(lambda_list.size() == 1);
         const double l0 = lambda_list[0];
         const double l1 = 0.5 - l0;