diff --git a/src/lib_ccx/lib_ccx.h b/src/lib_ccx/lib_ccx.h
index f938281b..99d32996 100644
--- a/src/lib_ccx/lib_ccx.h
+++ b/src/lib_ccx/lib_ccx.h
@@ -252,7 +252,6 @@ bool_t in_array(uint16_t *array, uint16_t length, uint16_t element) ;
 int hex_to_int (char high, char low);
 int hex_string_to_int(char* string, int len);
 void timestamp_to_srttime(uint64_t timestamp, char *buffer);
-void timestamp_to_smptetttime(uint64_t timestamp, char *buffer);
 int levenshtein_dist (const uint64_t *s1, const uint64_t *s2, unsigned s1len, unsigned s2len);
 void millis_to_date (uint64_t timestamp, char *buffer, enum ccx_output_date_format date_format, char millis_separator);
 void signal_handler(int sig_type);
diff --git a/src/lib_ccx/utility.c b/src/lib_ccx/utility.c
index 9dc59dd1..68fcea86 100644
--- a/src/lib_ccx/utility.c
+++ b/src/lib_ccx/utility.c
@@ -139,16 +139,6 @@ void timestamp_to_srttime(uint64_t timestamp, char *buffer)
 	sprintf(buffer, "%02"PRIu8":%02"PRIu8":%02"PRIu8",%03"PRIu16, h, m, s, u);
 }
 
-void timestamp_to_smptetttime(uint64_t timestamp, char *buffer)
-{
-	uint64_t p = timestamp;
-	uint8_t h = (uint8_t) (p / 3600000);
-	uint8_t m = (uint8_t) (p / 60000 - 60 * h);
-	uint8_t s = (uint8_t) (p / 1000 - 3600 * h - 60 * m);
-	uint16_t u = (uint16_t) (p - 3600000 * h - 60000 * m - 1000 * s);
-	sprintf(buffer, "%02"PRIu8":%02"PRIu8":%02"PRIu8".%03"PRIu16, h, m, s, u);
-}
-
 #define MIN3(a, b, c) ((a) < (b) ? ((a) < (c) ? (a) : (c)) : ((b) < (c) ? (b) : (c)))
 
 int levenshtein_dist (const uint64_t *s1, const uint64_t *s2, unsigned s1len, unsigned s2len)