diff --git a/programs/tsh/src/main.cpp b/programs/tsh/src/main.cpp
index b17c6ba4..07ac8668 100644
--- a/programs/tsh/src/main.cpp
+++ b/programs/tsh/src/main.cpp
@@ -23,7 +23,7 @@ int main(){
                 continue;
             }
 
-            input_buffer[c] = '\0';
+            input_buffer[c-1] = '\0';
 
             if(str_equals(input_buffer, "exit")){
                 exit(0);