diff --git a/src/userfunc.c b/src/userfunc.c
index 71b3983..7536234 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -5452,6 +5452,10 @@
 	// :func does not use Vim9 script syntax, even in a Vim9 script file
 	fp->uf_script_ctx.sc_version = SCRIPT_VERSION_MAX;
 
+    // If test_override('defcompile' 1) is used, then compile the function now
+    if (eap->cmdidx == CMD_def && override_defcompile)
+	defcompile_function(fp, NULL);
+
     goto ret_free;
 
 erret: