diff --git a/core/base/implicitTriangulation/ImplicitTriangulation.h b/core/base/implicitTriangulation/ImplicitTriangulation.h
index 6dd3fdc075..212e5280a6 100644
--- a/core/base/implicitTriangulation/ImplicitTriangulation.h
+++ b/core/base/implicitTriangulation/ImplicitTriangulation.h
@@ -1720,7 +1720,7 @@ inline void ttk::ImplicitTriangulation::vertexToPosition(const SimplexId vertex,
 inline void ttk::ImplicitTriangulation::edgeToPosition(const SimplexId edge,
                                                        const int k,
                                                        SimplexId p[3]) const {
-  const int e = (k) ? edge - esetshift_[k - 1] : edge;
+  const ttk::SimplexId e = (k) ? edge - esetshift_[k - 1] : edge;
   p[0] = e % eshift_[2 * k];
   p[1] = (e % eshift_[2 * k + 1]) / eshift_[2 * k];
   p[2] = e / eshift_[2 * k + 1];
diff --git a/core/base/periodicImplicitTriangulation/PeriodicImplicitTriangulation.h b/core/base/periodicImplicitTriangulation/PeriodicImplicitTriangulation.h
index 4ea847fc4e..108008cdd7 100644
--- a/core/base/periodicImplicitTriangulation/PeriodicImplicitTriangulation.h
+++ b/core/base/periodicImplicitTriangulation/PeriodicImplicitTriangulation.h
@@ -1106,7 +1106,7 @@ inline void
 
 inline void ttk::PeriodicImplicitTriangulation::edgeToPosition(
   const SimplexId edge, const int k, SimplexId p[3]) const {
-  const int e = (k) ? edge - esetshift_[k - 1] : edge;
+  const ttk::SimplexId e = (k) ? edge - esetshift_[k - 1] : edge;
   p[0] = e % eshift_[2 * k];
   p[1] = (e % eshift_[2 * k + 1]) / eshift_[2 * k];
   p[2] = e / eshift_[2 * k + 1];