diff --git a/tools/logger/convert.c b/tools/logger/convert.c
index e393f828e..7de47f970 100644
--- a/tools/logger/convert.c
+++ b/tools/logger/convert.c
@@ -318,7 +318,7 @@ static double to_usecs(uint64_t time)
 }
 
 /** Justified timestamp width for printf format string */
-static unsigned int timestamp_width(unsigned int precision)
+static uint8_t timestamp_width(uint8_t precision)
 {
 	/* 64bits yields less than 20 digits precision. As reported by
 	 * gcc 9.3, this avoids a very long precision causing snprintf()
@@ -352,7 +352,7 @@ static inline void print_table_header(void)
 	}
 
 	if (global_config->time_precision >= 0) {
-		const unsigned int ts_width = timestamp_width(global_config->time_precision);
+		const uint8_t ts_width = timestamp_width(global_config->time_precision);
 
 		fprintf(out_fd, "%*s(us)%*s  ", -ts_width, " TIMESTAMP", ts_width, "DELTA");
 	}
diff --git a/tools/logger/convert.h b/tools/logger/convert.h
index dcf8d0db0..8117e023b 100644
--- a/tools/logger/convert.h
+++ b/tools/logger/convert.h
@@ -41,7 +41,7 @@ struct convert_config {
 	int dump_ldc;
 	int hide_location;
 	int relative_timestamps;
-	int time_precision;
+	uint8_t time_precision;
 	struct snd_sof_uids_header *uids_dict;
 	struct snd_sof_logs_header *logs_header;
 };