diff --git a/src/mini-journalreader.c b/src/mini-journalreader.c
index 98bcaac..4fc5415 100644
--- a/src/mini-journalreader.c
+++ b/src/mini-journalreader.c
@@ -169,7 +169,7 @@ static bool print_field(sd_journal *j, const char *field) {
     if (json) {
         char tmp[7];
         for (size_t i = 0; i < l;i++) {
-            if (d[i] == '"' || d[i] == '\\' || (d[i] >= 0 && d[i] <= 0x1F)) {
+	    if (d[i] == '"' || d[i] == '\\' || d[i] <= 0x1F) {
                 sprintf(tmp, "\\u%04X", d[i]);
                 print_to_buf(tmp, 6);
             } else {
@@ -257,10 +257,12 @@ int main(int argc, char *argv[]) {
     uint64_t begin = 0;
     uint64_t end = 0;
     char c;
+    int opt = 0;
 
     progname = argv[0];
 
-    while ((c = (char)getopt (argc, argv, "b:e:d:n:f:t:jh")) != -1) {
+    while ((opt = getopt (argc, argv, "b:e:d:n:f:t:jh")) != -1) {
+        c = (char) opt;
         switch (c) {
             case 'b':
                 begin = arg_to_uint64(optarg);