diff --git a/config/nim.cfg b/config/nim.cfg
index 1e4bc7b2459a9..bbfac1f313319 100644
--- a/config/nim.cfg
+++ b/config/nim.cfg
@@ -76,6 +76,7 @@ path="$lib/pure"
   debugger:off
   line_dir:off
   opt:speed
+  define:release
 @end
 
 @if false: # not danger: # this does not work yet.
diff --git a/tests/misc/tdangerisrelease.nim b/tests/misc/tdangerisrelease.nim
new file mode 100644
index 0000000000000..d2f9df090d277
--- /dev/null
+++ b/tests/misc/tdangerisrelease.nim
@@ -0,0 +1,13 @@
+discard """
+  cmd: "nim c -d:danger -r $file"
+  output: '''
+a
+b
+c
+'''
+"""
+
+echo "a"
+when defined(release):
+  echo "b"
+echo "c"