diff --git a/du4/program.c b/du4/program.c
index 66bb4e5..ffb2624 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -61,10 +61,11 @@ int main()
     	char *new_str = compactString(str[i],strlen(str[i]));
     	double first =-5,second =-5,res=-5;
     	char c='E';
-    	sscanf(new_str,"%lf%c%lf%*[=]%lf",&first,&c,&second,&res);
+      	char ravno[3];
+    	sscanf(new_str,"%lf%c%lf%s%lf",&first,&c,&second,ravno,&res);
     
     
-    	if(c=='E'||first==-5||second==-5||res==-5||(c!=43&&c!=42&&c!=45&&c!=47)){
+    	if(c=='E'||first==-5||second==-5||res==-5||(c!=43&&c!=42&&c!=45&&c!=47||(strlen(ravno)==1&&ravno[0]=='=')){
     	    printf("CHYBA\n");
           	continue;
     	}