diff --git a/src/libruntime/deserializer.h b/src/libruntime/deserializer.h
index da8276c7c..984da5436 100644
--- a/src/libruntime/deserializer.h
+++ b/src/libruntime/deserializer.h
@@ -17,9 +17,11 @@
 #define DESERIALIZER_H
 
 #include "globals.h"
+#include "ecma-globals.h"
 
-const char *deserialize_string_by_id (uint8_t);
+const ecma_char_t *deserialize_string_by_id (uint8_t);
 int deserialize_num_by_id (uint8_t);
 const void *deserialize_bytecode (void);
+uint8_t deserialize_min_temp (void);
 
 #endif //DESERIALIZER_H
\ No newline at end of file
diff --git a/src/libruntime/target/linux/deserializer.c b/src/libruntime/target/linux/deserializer.c
index ec5673a50..fb09c43b4 100644
--- a/src/libruntime/target/linux/deserializer.c
+++ b/src/libruntime/target/linux/deserializer.c
@@ -16,7 +16,10 @@
 #include "deserializer.h"
 #include "bytecode-linux.h"
 
-const char *
+int *num_data = NULL;
+uint8_t num_size = 0;
+
+const ecma_char_t *
 deserialize_string_by_id (uint8_t id)
 {
   uint8_t size = *bytecode_data, *data = bytecode_data, offset;
@@ -28,28 +31,33 @@ deserialize_string_by_id (uint8_t id)
 
   offset = *data;
 
-  return (char*) (bytecode_data + offset);
+  return bytecode_data + offset;
 }
 
 int 
 deserialize_num_by_id (uint8_t id)
 {
-  int *num_data;
-  uint8_t str_size, str_offset, *data, num_size;
+  uint8_t str_size, str_offset, *data;
 
   str_size = *bytecode_data;
-  data = bytecode_data + str_size;
   if (id < str_size)
-    return 0;
+    {
+      return 0;
+    }
   id = (uint8_t) (id - str_size);
-  str_offset = *data;
-  data = bytecode_data + str_offset;
+  
+  if (num_data == NULL)
+    {
+      data = bytecode_data + str_size;
+      str_offset = *data;
+      data = bytecode_data + str_offset;
 
-  while (*data)
-    data++;
-
-  num_size = *(++data);
-  num_data = (int *) ++data;
+      while (*data)
+        data++;
+  
+      num_size = *(++data);
+      num_data = (int *) ++data;
+    }
 
   if (id >= num_size)
     return 0;
@@ -62,3 +70,16 @@ deserialize_bytecode (void)
 {
   return bytecode_opcodes;
 }
+
+uint8_t 
+deserialize_min_temp (void)
+{
+  uint8_t str_size = *bytecode_data;
+  
+  if (num_size == 0)
+    {
+      deserialize_num_by_id (str_size); // Init num_data and num_size
+    }
+
+  return (uint8_t) (str_size + num_size);
+}
diff --git a/src/libruntime/target/linux/serializer.c b/src/libruntime/target/linux/serializer.c
index 9d2c92bf5..dfe4bf399 100644
--- a/src/libruntime/target/linux/serializer.c
+++ b/src/libruntime/target/linux/serializer.c
@@ -71,7 +71,7 @@ serializer_dump_strings (const char *strings[], uint8_t size)
 #ifndef JERRY_NDEBUG
   for (i = 0; i < size; i++)
     {
-      JERRY_ASSERT (!__strcmp (strings[i], deserialize_string_by_id (i)));
+      JERRY_ASSERT (!__strcmp (strings[i], (const char *) deserialize_string_by_id (i)));
     }
 #endif
 
@@ -112,6 +112,8 @@ serializer_dump_nums (const int nums[], uint8_t size, uint8_t offset, uint8_t st
     {
       JERRY_ASSERT (nums[i] == deserialize_num_by_id ((uint8_t) (i + strings_num)));
     }
+
+  JERRY_ASSERT (deserialize_min_temp () == (uint8_t) (size + strings_num));
 #endif
 }
 
diff --git a/src/libruntime/target/stm32f4/deserializer.c b/src/libruntime/target/stm32f4/deserializer.c
index f3ec5edce..e77ae97af 100644
--- a/src/libruntime/target/stm32f4/deserializer.c
+++ b/src/libruntime/target/stm32f4/deserializer.c
@@ -17,7 +17,7 @@
 
 TODO (Implement)
 
-const char *
+const ecma_char_t *
 deserialize_string_by_id (uint8_t id)
 {
   JERRY_UNIMPLEMENTED_REF_UNUSED_VARS (id);
@@ -34,3 +34,9 @@ deserialize_bytecode (void)
 {
   JERRY_UNIMPLEMENTED ();
 }
+
+uint8_t 
+deserialize_min_temp (void)
+{
+  JERRY_UNIMPLEMENTED ();
+}
\ No newline at end of file