diff --git a/addons/res_config_mysql.c b/addons/res_config_mysql.c
index e770452fd4..1ba5224855 100644
--- a/addons/res_config_mysql.c
+++ b/addons/res_config_mysql.c
@@ -307,7 +307,7 @@ static char *decode_chunk(char *chunk)
 	char *orig = chunk;
 	for (; *chunk; chunk++) {
 		if (*chunk == '^' && strchr("0123456789ABCDEFabcdef", chunk[1]) && strchr("0123456789ABCDEFabcdef", chunk[2])) {
-			sscanf(chunk + 1, "%02hhd", chunk);
+			sscanf(chunk + 1, "%02hhX", chunk);
 			memmove(chunk + 1, chunk + 3, strlen(chunk + 3) + 1);
 		}
 	}
diff --git a/main/config.c b/main/config.c
index 34e4247a70..d763adac4a 100644
--- a/main/config.c
+++ b/main/config.c
@@ -2361,7 +2361,7 @@ char *ast_realtime_decode_chunk(char *chunk)
 	char *orig = chunk;
 	for (; *chunk; chunk++) {
 		if (*chunk == '^' && strchr("0123456789ABCDEFabcdef", chunk[1]) && strchr("0123456789ABCDEFabcdef", chunk[2])) {
-			sscanf(chunk + 1, "%02hhd", chunk);
+			sscanf(chunk + 1, "%02hhX", chunk);
 			memmove(chunk + 1, chunk + 3, strlen(chunk + 3) + 1);
 		}
 	}
diff --git a/res/res_config_odbc.c b/res/res_config_odbc.c
index 15534c7faf..64628c2866 100644
--- a/res/res_config_odbc.c
+++ b/res/res_config_odbc.c
@@ -62,7 +62,7 @@ static void decode_chunk(char *chunk)
 {
 	for (; *chunk; chunk++) {
 		if (*chunk == '^' && strchr("0123456789ABCDEFabcdef", chunk[1]) && strchr("0123456789ABCDEFabcdef", chunk[2])) {
-			sscanf(chunk + 1, "%02hhd", chunk);
+			sscanf(chunk + 1, "%02hhX", chunk);
 			memmove(chunk + 1, chunk + 3, strlen(chunk + 3) + 1);
 		}
 	}