diff --git a/cv8/program.c b/cv8/program.c
index f5e723c..c3ac408 100644
--- a/cv8/program.c
+++ b/cv8/program.c
@@ -36,7 +36,7 @@ struct tree* read_tree(){
 }
 struct tree* search(struct tree* this){
     
-    char c = getchar();
+    int c = getchar();
       
     if(this->left != NULL && this->right != NULL){
         if(c == 'a'){
@@ -47,7 +47,6 @@ struct tree* search(struct tree* this){
             printf("%s\n", this->right);
             this->right = search(this->right); 
         } 
-    
     }
 }