glTexImage2D - segfault

Hello, I am having some trouble with glTexImage2D. What happens is it segfaults every now and then (about 9 out of 10 times). This is what I am doing essentially:

GLuint ID;
char data[64*64];

glEnable(GL_TEXTURE_2D);
glGenTextures(1, &ID);
glBindTexture(GL_TEXTURE_2D, ID);

// Segfault here -->
glTexImage2D(GL_TEXTURE_2D, 0, 4, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
// <--

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

...

I am checking for errors with glGetError() after glEnable, glGenTextures, and glBindTexture, and no errors turn up.

Could anyone provide any light as to what might cause the problem?
Thanks in advance.