1 files changed, 1 insertions, 1 deletions

diff --git a/apps/plugin.h b/apps/plugin.h
index 461966e8bd..d332a0d004 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -555,7 +555,7 @@ struct plugin_api {
     int (*mas_codec_readreg)(int reg);
     void (*i2c_begin)(void);
     void (*i2c_end)(void);
-    int  (*i2c_write)(int address, unsigned char* buf, int count );
+    int  (*i2c_write)(int address, const unsigned char* buf, int count );
 #endif
 #endif