diff --git a/glfw/cocoa_window.m b/glfw/cocoa_window.m
index d854aa29d..fc6b65057 100644
--- a/glfw/cocoa_window.m
+++ b/glfw/cocoa_window.m
@@ -232,7 +232,7 @@ format_text(const char *src) {
     char *p = buf;
     if (!src[0]) return "<none>";
     while (*src) {
-        p += snprintf(p, sizeof(buf) - (p - buf), "%x ", (unsigned char)*(src++));
+        p += snprintf(p, sizeof(buf) - (p - buf), "0x%x ", (unsigned char)*(src++));
     }
     if (p != buf) *(--p) = 0;
     return buf;
@@ -856,7 +856,7 @@ is_ascii_control_char(char x) {
         }
         if (window->ns.deadKeyState && (char_count == 0 || scancode == 0x75)) {
             // 0x75 is the delete key which needs to be ignored during a compose sequence
-            debug_key(@"Ignoring dead key.\n");
+            debug_key(@"Ignoring dead key (text: %s).\n", format_text(_glfw.ns.text));
             return;
         }
     }