diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index 11ebd06..8c4ceae 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -315,10 +315,13 @@ setup_interleaved_attribs(struct gl_context *ctx,
    const GLubyte *low_addr = NULL;
 
    /* Find the lowest address. */
-   for (attr = 0; attr < vpv->num_inputs; attr++) {
-      const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
+   if(vpv->num_inputs) {
+       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 
-      low_addr = !low_addr ? start : MIN2(low_addr, start);
+       for (attr = 1; attr < vpv->num_inputs; attr++) {
+          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
+          low_addr = MIN2(low_addr, start);
+       }
    }
 
    for (attr = 0; attr < vpv->num_inputs; attr++) {