1 files changed, 1 insertions, 1 deletions

diff --git a/src/frame.c b/src/frame.c
index 006e4dec781..9a865c379d6 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -1062,7 +1062,7 @@ store_frame_param (f, prop, val)
         error ("Surrogate minibuffer windows must be minibuffer windows.");
 
       if (FRAME_HAS_MINIBUF_P (f) || FRAME_MINIBUF_ONLY_P (f))
-        error ("Can't change the surrogate minibuffer of a frame with its own minibuffer.");
+        error ("can't change the surrogate minibuffer of a frame with its own minibuffer");
 
       /* Install the chosen minibuffer window, with proper buffer.  */
       f->minibuffer_window = val;