diff --git a/common/options.cpp b/common/options.cpp
index d909ac9bb0..b072a06d28 100644
--- a/common/options.cpp
+++ b/common/options.cpp
@@ -274,7 +274,7 @@ int convert_bytes_num_to_string(long long bytes, char *res, int res_size) {
 }
 
 int parse_time_limit(const char *s) {
-  int x;
+  int x = 0;
   char c = 0;
   if (sscanf(s, "%d%c", &x, &c) < 1) {
     kprintf ("Parsing time limit for option fail: %s\n", s);
diff --git a/server/php-engine.cpp b/server/php-engine.cpp
index 3eaffff611..6a53a9ec6d 100644
--- a/server/php-engine.cpp
+++ b/server/php-engine.cpp
@@ -1840,7 +1840,11 @@ int main_args_handler(int i, const char *long_option) {
     }
     case 'm': {
       max_memory = parse_memory_limit_default(optarg, 'm');
-      assert((1 << 20) <= max_memory && max_memory <= (2047LL << 20));
+      const long long min_size = 1 << 20;
+      if (max_memory <= min_size) {
+        kprintf("--%s option: cannot be less than 1 megabyte\n", long_option);
+        return -1;
+      }
       return 0;
     }
     case 'f': {