diff --git a/src/BuildOptUser.h b/src/BuildOptUser.h
new file mode 100644
index 00000000..5df3c2be
--- /dev/null
+++ b/src/BuildOptUser.h
@@ -0,0 +1,11 @@
+#if !defined(_RADIOLIB_USER_BUILD_OPTIONS_H)
+#define _RADIOLIB_USER_BUILD_OPTIONS_H
+
+// this file can be used to define any user build options
+// most commonly, RADIOLIB_EXCLUDE_* macros
+// or enabling debug output
+
+//#define RADIOLIB_DEBUG
+//#define RADIOLIB_VERBOSE
+
+#endif
diff --git a/src/TypeDef.h b/src/TypeDef.h
index 128ae0bb..153f3a3c 100644
--- a/src/TypeDef.h
+++ b/src/TypeDef.h
@@ -2,6 +2,7 @@
 #define _RADIOLIB_TYPES_H
 
 #include "BuildOpt.h"
+#include "BuildOptUser.h"
 
 /*!
   \defgroup config_shaping Data shaping filter values aliases.
@@ -312,6 +313,28 @@
 */
 #define RADIOLIB_ERR_MIC_E_TELEMETRY_STATUS                    (-204)
 
+// SSDV status codes
+
+/*!
+  \brief SSDV mode is invalid.
+*/
+#define RADIOLIB_ERR_INVALID_SSDV_MODE                         (-301)
+
+/*!
+  \brief Image size is invalid.
+*/
+#define RADIOLIB_ERR_INVALID_IMAGE_SIZE                        (-302)
+
+/*!
+  \brief Image quality is invalid.
+*/
+#define RADIOLIB_ERR_INVALID_IMAGE_QUALITY                     (-303)
+
+/*!
+  \brief Image subsampling is invalid.
+*/
+#define RADIOLIB_ERR_INVALID_SUBSAMPLING                       (-304)
+
 // RTTY status codes
 
 /*!