diff --git a/du1/program.c b/du1/program.c
index 1b89ce2..2101f00 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -7,7 +7,10 @@ int count = 0;
 int riadok = 0;
 int pop = 0;
 while(c != EOF){
-c = getchar();	
+c = getchar();
+if(c == EOF){
+break;
+}
 if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')){
 if(islower(c)){
 c = toupper(c);