Can I make this if statement with lots of ORs more concise?

I'm refreshing my knowledge of C by doing some random exercises. The following is an excerpt from my solution to counting how many vowels in a string. It works but there has to be a more concise way to write this if statement. Any ideas?

for(int i = 0; i < length; i++) {
    if(input[i] == 'a' || input[i] == 'e' || input[i] == 'i' || input[i] == 'o' || input[i] == 'u') {
        total++;
    }
}