diff --git a/libraries/AP_OSD/AP_OSD.h b/libraries/AP_OSD/AP_OSD.h
index 2445cee2fd..9a3764ed4a 100644
--- a/libraries/AP_OSD/AP_OSD.h
+++ b/libraries/AP_OSD/AP_OSD.h
@@ -304,12 +304,12 @@ public:
     // initialize the setting from the configured information
     void update();
     // grab the parameter name
-    void copy_name(char* name, size_t len) {
+    void copy_name(char* name, size_t len) const {
         _param->copy_name_token(_current_token, name, len);
         if (len > 16) name[16] = 0;
     }
     // copy the name converting FOO_BAR_BAZ to FooBarBaz
-    void copy_name_camel_case(char* name, size_t len);
+    void copy_name_camel_case(char* name, size_t len) const;
     // set the ranges from static metadata
     bool set_from_metadata();
     bool set_by_name(const char* name, uint8_t config_type, float pmin=0, float pmax=0, float pincr=0);
diff --git a/libraries/AP_OSD/AP_OSD_Backend.h b/libraries/AP_OSD/AP_OSD_Backend.h
index 4fe7cd4696..3623bafb5c 100644
--- a/libraries/AP_OSD/AP_OSD_Backend.h
+++ b/libraries/AP_OSD/AP_OSD_Backend.h
@@ -68,7 +68,7 @@ protected:
     }
 
     //check option
-    bool check_option(uint32_t option)
+    bool check_option(uint32_t option) const
     {
         return (_osd.options & option) != 0;
     }
diff --git a/libraries/AP_OSD/AP_OSD_ParamSetting.cpp b/libraries/AP_OSD/AP_OSD_ParamSetting.cpp
index 129becf4e4..8c30b3c02b 100644
--- a/libraries/AP_OSD/AP_OSD_ParamSetting.cpp
+++ b/libraries/AP_OSD/AP_OSD_ParamSetting.cpp
@@ -417,7 +417,7 @@ void AP_OSD_ParamSetting::guess_ranges(bool force)
 }
 
 // copy the name converting FOO_BAR_BAZ to FooBarBaz
-void AP_OSD_ParamSetting::copy_name_camel_case(char* name, size_t len)
+void AP_OSD_ParamSetting::copy_name_camel_case(char* name, size_t len) const
 {
     char buf[17];
     _param->copy_name_token(_current_token, buf, 17);