diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 338167e..656185a 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -4332,6 +4332,23 @@
   set foldlevel&
 enddef
 
+def Test_option_set_line_number()
+  var lines =<< trim END
+      vim9script
+      # line2
+      # line3
+      def F()
+          # line5
+          &foldlevel = -128
+      enddef
+      F()
+  END
+  v9.CheckScriptSuccess(lines)
+
+  var res = execute('verbose set foldlevel')
+  assert_match('  foldlevel.*Last set from .*XScriptSuccess\d\+ line 6', res)
+enddef
+
 def Test_option_modifier()
   # legacy script allows for white space
   var lines =<< trim END
diff --git a/src/version.c b/src/version.c
index c94a450..517e050 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1850,
+/**/
     1849,
 /**/
     1848,
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 2fbce78..c29873c 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -3836,6 +3836,7 @@
 		    char_u	*tofree = NULL;
 
 		    --ectx->ec_stack.ga_len;
+		    SOURCING_LNUM = iptr->isn_lnum;
 		    tv = STACK_TV_BOT(0);
 		    if (tv->v_type == VAR_STRING)
 		    {
@@ -3845,7 +3846,6 @@
 		    }
 		    else if (iptr->isn_type == ISN_STOREFUNCOPT)
 		    {
-			SOURCING_LNUM = iptr->isn_lnum;
 			// If the option can be set to a function reference or
 			// a lambda and the passed value is a function
 			// reference, then convert it to the name (string) of