diff --git a/du6/program.c b/du6/program.c
index 2c60c7e..b55d71a 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -18,12 +18,12 @@ void trim(char *str){
  
 Tree* read_tree() {
 	char buffer[256];
-	if(fgets(buffer,256,stdin))return NULL;
+	if(!fgets(buffer,256,stdin))return NULL;
 	if(strcmp(buffer, "\n") == 0 ) return NULL;
 	
 	trim(buffer);
 
-	Tree* node = calloc(1, sizeof(node));
+	Tree* node = calloc(1, sizeof(Tree));
 	
 	strcpy(node->value, buffer);
 	if(buffer[0] == '*'){