diff --git a/measprocess/geospatial/process.py b/measprocess/geospatial/process.py
index 74c3509d4c99f1b9ffdd8d35a3161b5b473ea5af..f139496997f9a2894dce7de8b851c3bedec2dfa7 100644
--- a/measprocess/geospatial/process.py
+++ b/measprocess/geospatial/process.py
@@ -49,7 +49,7 @@ def project_onto_streets(
             )
         )
 
-    projected = gpd.GeoSeries(projected)
+    projected = gpd.GeoSeries(projected, index=point_series.index)
     projected = projected.set_crs(epsg)
     deviation_projection = projected.distance(point_series)