diff --git a/libs/string.h b/libs/string.h
index 474d677..cfd8c1b 100644
--- a/libs/string.h
+++ b/libs/string.h
@@ -2,17 +2,20 @@
 #include <string.h>
 #include <stdio.h>
 
+// It's base. NUL terminator.
+int nulTerm = 1;
+
 // -------------------------------------
 // BASE - String and init of this
 // -------------------------------------
 typedef char* string;
 string strInit(char* s) {
-	string str = malloc(strlen(s) * sizeof(char));
+	string str = malloc(strlen(s) + nulTerm);
 	strcpy(str, s);
 	return str;
 }
 void strResize(string* s, int new_size) {
-	*s = realloc(*s, new_size * sizeof(char));
+	*s = realloc(*s, new_size + nulTerm);
 }
 // -------------- END ------------------
 
@@ -22,15 +25,15 @@ void strResize(string* s, int new_size) {
 // FUNCTION - basic operations
 // -------------------------------------
 void strAdd(string* s, char* str_new) {
-	*s = realloc(*s, strlen(*s) + strlen(str_new)*sizeof(char));
+	*s = realloc(*s, strlen(*s) + strlen(str_new) + nulTerm);
 	strcat(*s, str_new);
 }
 void strSet(string* s, char* str_new) {
-	*s = realloc(*s, strlen(str_new)*sizeof(char));
+	*s = realloc(*s, strlen(str_new) + nulTerm);
 	strcpy(*s, str_new);
 }
-void strCopy(string* s1, string* s2) {
-	strcpy(*s2, *s1);
+void strCopy(string* src, string* dst) {
+	strcpy(*src, *dst);
 }
 // -------------- END ------------------
 
@@ -44,17 +47,17 @@ int numLen(double num) {
 }
 
 char* int2Str(int* num) {
-    char* buffer = malloc(numLen(*num) + 2);
+    char* buffer = malloc(numLen(*num) + nulTerm);
     sprintf(buffer, "%d", *num);
     return buffer;
 }
 char* float2Str(float* num) {
-    char* buffer = malloc(numLen(*num) + 2);
+    char* buffer = malloc(numLen(*num) + nulTerm);
     sprintf(buffer, "%f", *num);
     return buffer;
 }
 char* double2Str(double* num) {
-    char* buffer = malloc(numLen(*num) + 2);
+    char* buffer = malloc(numLen(*num) + nulTerm);
     sprintf(buffer, "%lf", *num);
     return buffer;
 }