diff --git a/du3/program.c b/du3/program.c
index 99b7f68..0f66c87 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -40,7 +40,7 @@ int main(){
 		char *endptr;
 		float num = strtof(x, &endptr);
 
-		if (*endptr == "\0") { // je cislo
+		if (*endptr == '\0') { // je cislo
 			if(mystack.size >= SIZE) {
 				fprintf(stderr," plne \n");
 				return 1;
@@ -61,7 +61,7 @@ int main(){
 				case '*': result = a * b;break;
 				case '/':
 					  if(b == 0){
-						fprintf(strderr, "nule pr ideleni \n");
+						fprintf(stderr, "nule pr ideleni \n");
 						return 1;
 					  }
 				result = a / b;