diff --git a/vncviewer/fltk_layout.h b/vncviewer/fltk_layout.h
index c16a359..21fb00a 100644
--- a/vncviewer/fltk_layout.h
+++ b/vncviewer/fltk_layout.h
@@ -20,6 +20,7 @@
 #define __FLTK_LAYOUT_H__
 
 #include <FL/fl_draw.H>
+#include <FL/Fl_Menu_.H>
 
 /* Calculates the width of a string as printed by FLTK (pixels) */
 static inline int gui_str_len(const char *str)
@@ -67,6 +68,53 @@
     return len;
 }
 
+/* Filter out unsafe characters for menu entries */
+static inline int fltk_menu_escape(const char *in, char *out, size_t maxlen)
+{
+    int len;
+
+    len = 0;
+
+    while (*in != '\0') {
+        if (*in == '/') {
+            if (maxlen >= 3) {
+                *out++ = '\\';
+                *out++ = '/';
+                maxlen -= 2;
+            }
+
+            len += 2;
+        } else {
+            if (maxlen >= 2) {
+                *out++ = *in;
+                maxlen--;
+            }
+
+            len += 1;
+        }
+
+        in++;
+    }
+
+    if (maxlen)
+        *out = '\0';
+
+    return len;
+}
+
+/* Helper to add menu entries safely */
+static inline void fltk_menu_add(Fl_Menu_ *menu, const char *text,
+                                 int shortcut, Fl_Callback *cb,
+                                 void *data = 0, int flags = 0)
+{
+    char buffer[1024];
+
+    if (fltk_menu_escape(text, buffer, sizeof(buffer)) >= sizeof(buffer))
+        return;
+
+    menu->add(buffer, shortcut, cb, data, flags);
+}
+
 /**** MARGINS ****/
 
 #define OUTER_MARGIN            10