diff --git a/kernel/kernel.c b/kernel/kernel.c
index f7ea26c..0333a43 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -1,14 +1,15 @@
 #include "../drivers/vga.h"
+#include "../lib/str.h"
 #include "../lib/strf.h"
 
 void main() {
 	vga_init(); 	// Initialize the screen first
 			// i.e. clear the screen et cetera.
 
-	int test = 1234;
-	char* teststr;
-	teststr = int_to_str(test, teststr);
-	println(teststr, 0xf0);
+	char* strbuf = "HEJ";
+	char* str2 = "xD";
+	strbuf = strcat(strbuf, str2); 
+	println(strbuf, 0xf0);
 
 	set_cursor_pos(28, 2);
 	print("eOS Version 0.1 2021", 0xf0);
diff --git a/lib/str.c b/lib/str.c
index a0a7ef7..0153b87 100644
--- a/lib/str.c
+++ b/lib/str.c
@@ -5,7 +5,6 @@ unsigned int strlen(char* str) {
 	for( c = str; *c != '\0'; c++ ) 	// search for end-of-string
 
 	return (unsigned int)(c - str);		// get size by delta-address
-
 }
 
 char* strcat(char* buf, char* str) {
@@ -15,7 +14,11 @@ char* strcat(char* buf, char* str) {
 	*(buf + bufferlen) = 0x3f;		// placeholder
 
 	// concat the str to buf
+	int cc = 0;
 	for( char* c = str; *c != '\0'; c++ ) {
-		
+		*(buf + bufferlen + cc) = *c;
+		cc++;
 	}
+
+	return buf;
 }