diff --git a/src/string/str.c b/src/string/str.c
index 84f74c4..26b58c9 100755
--- a/src/string/str.c
+++ b/src/string/str.c
@@ -134,10 +134,10 @@ str hex_to_str(Array(u8) buf, bool uppercase){
 }
 
 void str_trim(str* line, bool set_zero_at_end){
-    bool stop = false;
     // loop forward
+    bool stop = false;
     while(line->size > 0 && !stop){
-        char first_char = line->data[line->size - 1];
+        char first_char = line->data[0];
         switch(first_char){
             case '\0': case '\r': case '\n':
             case '\t': case ' ':
@@ -149,7 +149,9 @@ void str_trim(str* line, bool set_zero_at_end){
                 break;
         }
     }
+    
     // loop backward
+    stop = false;
     while(line->size > 0 && !stop)
     {
         char last_char = line->data[line->size - 1];
@@ -163,6 +165,7 @@ void str_trim(str* line, bool set_zero_at_end){
                 break;
         }
     }
+
     if(set_zero_at_end){
         line->data[line->size] = '\0';
         line->isZeroTerminated = true;