diff --git a/cmake/thisdd4hep_package.sh.in b/cmake/thisdd4hep_package.sh.in
index 69ffbf2767265cc304ee07201d943e0f8908d486..61d1995e4b522ae9c3322f9c387ca9a9dcee9110 100644
--- a/cmake/thisdd4hep_package.sh.in
+++ b/cmake/thisdd4hep_package.sh.in
@@ -7,7 +7,7 @@
 #################################################################################
 
 
-source @DD4hep_ROOT@/bin/thisDD4hep.sh
+source @DD4hep_ROOT@/bin/thisdd4hep.sh
 
 export PATH=$PATH:@CMAKE_INSTALL_PREFIX@/bin
 
@@ -16,4 +16,4 @@ then
     export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:@CMAKE_INSTALL_PREFIX@/lib
 else
     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:@CMAKE_INSTALL_PREFIX@/lib
-fi
\ No newline at end of file
+fi