diff --git a/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp b/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp
index 0de85308805b8b43b57143fa8598d9bc6e2d7c97..9319ed1165792a833f717d0f9c0251a44d3b504c 100644
--- a/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp
+++ b/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp
@@ -170,7 +170,7 @@ void LocalLinearLeastSquaresExtrapolator::extrapolateElement(
     if (num_int_pts < num_nodes)
     {
         OGS_FATAL(
-            "Least squares is not possible if there are more nodes than"
+            "Least squares is not possible if there are more nodes than "
             "integration points.");
     }