diff --git a/dynamic.h b/dynamic.h
index f403b89fa4..4922ddf4ba 100644
--- a/dynamic.h
+++ b/dynamic.h
@@ -53,18 +53,6 @@ const struct retro_controller_description *
    libretro_find_controller_description(
          const struct retro_controller_info *info, unsigned id);
 
-/**
- * rarch_environment_cb:
- * @cmd                          : Identifier of command.
- * @data                         : Pointer to data.
- *
- * Environment callback function implementation.
- *
- * Returns: true (1) if environment callback command could
- * be performed, otherwise false (0).
- **/
-bool rarch_environment_cb(unsigned cmd, void *data);
-
 struct retro_core_t
 {
    void (*retro_init)(void);
diff --git a/retroarch.c b/retroarch.c
index 0b98a569e6..959ad4d2ff 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -1634,6 +1634,7 @@ static char *secondary_library_path                = NULL;
 #endif
 
 /* Forward declarations */
+static bool rarch_environment_cb(unsigned cmd, void *data);
 static bool driver_location_get_position(double *lat, double *lon,
       double *horiz_accuracy, double *vert_accuracy);
 static void driver_location_set_interval(unsigned interval_msecs,
@@ -6405,7 +6406,7 @@ static bool rarch_clear_all_thread_waits(unsigned clear_threads, void *data)
  * Returns: true (1) if environment callback command could
  * be performed, otherwise false (0).
  **/
-bool rarch_environment_cb(unsigned cmd, void *data)
+static bool rarch_environment_cb(unsigned cmd, void *data)
 {
    unsigned p;
    settings_t         *settings = configuration_settings;