diff --git a/res/res_config_odbc.c b/res/res_config_odbc.c
index 90d5c4ea35..ef45bfc999 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);
 		}
 	}
diff --git a/res/res_config_pgsql.c b/res/res_config_pgsql.c
index 14146e3304..e58f8adb5f 100644
--- a/res/res_config_pgsql.c
+++ b/res/res_config_pgsql.c
@@ -296,7 +296,7 @@ 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);
 		}
 	}