diff --git a/tools/install/get_lazarus_version.sh b/tools/install/get_lazarus_version.sh
index ffc9eaa4d7..1cc56a0bab 100755
--- a/tools/install/get_lazarus_version.sh
+++ b/tools/install/get_lazarus_version.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-grep 'LazarusVersionStr= ' ../../ide/aboutfrm.pas \
-  | sed -e 's/.*[^0-9 \.]\([0-9\.][0-9\.]*\)[^0-9\.].*/\1/'
+cat ../../ide/version.inc \
+  | sed -e 's/.*[^0-9 \.]\([0-9\.]\+\)[^0-9\.].*/\1/'
 
 # end.