diff --git a/external/resinsight/LibGeometry/cvfRay.cpp b/external/resinsight/LibGeometry/cvfRay.cpp
index 088ef7c7a..8fb7da149 100644
--- a/external/resinsight/LibGeometry/cvfRay.cpp
+++ b/external/resinsight/LibGeometry/cvfRay.cpp
@@ -283,7 +283,7 @@ bool Ray::boxIntersect(const BoundingBox& box, Vec3d* intersectionPoint) const
 
     // Find candidate planes; this loop can be avoided if rays cast all from the eye(assume perpsective view)
     bool inside = true;
-    char quadrant[3];
+    char quadrant[3]{};
     double candidatePlane[3] = {0.0, 0.0, 0.0};
 
     Vec3d min = box.min();
@@ -320,17 +320,13 @@ bool Ray::boxIntersect(const BoundingBox& box, Vec3d* intersectionPoint) const
     }
 
     // Calculate T distances to candidate planes
-    double maxT[3];
+    double maxT[3]{-1.0f, -1.0f, -1.0f};
     for (i = 0; i < 3; i++)
     {
         if (quadrant[i] != MIDDLE && m_direction[i] !=0.0f)
         {
             maxT[i] = (candidatePlane[i] - m_origin[i]) / m_direction[i];
         }
-        else
-        {
-            maxT[i] = -1.0f;
-        }
     }
 
     // Get largest of the maxT's for final choice of intersection
diff --git a/external/resinsight/cafHexGridIntersectionTools/cafHexGridIntersectionTools.cpp b/external/resinsight/cafHexGridIntersectionTools/cafHexGridIntersectionTools.cpp
index 9e36c8fb9..58023d5c9 100644
--- a/external/resinsight/cafHexGridIntersectionTools/cafHexGridIntersectionTools.cpp
+++ b/external/resinsight/cafHexGridIntersectionTools/cafHexGridIntersectionTools.cpp
@@ -1084,7 +1084,7 @@ int HexGridIntersectionTools::planeHexIntersectionMC( const cvf::Plane&    plane
     }
 
     cvf::Vec3d edgeIntersections[12];
-    double     normDistAlongEdge[12];
+    double     normDistAlongEdge[12]{};
 
     // Compute vertex coordinates on the edges where we have intersections
     if ( cubeIdxToCutEdgeBitfield[cubeIndex] & 1 )