diff --git a/src/func.zig b/src/func.zig
index 2b00999..ef0e09b 100644
--- a/src/func.zig
+++ b/src/func.zig
@@ -117,7 +117,7 @@ pub const Func = extern struct {
 
                         comptime var offset = 0;
                         // If the first function parameter accepts a *Caller, pass that in!
-                        if (meta.params[0].type.? == *Caller) {
+                        if (meta.params.len > 0 and meta.params[0].type.? == *Caller) {
                             func_args[0] = caller;
                             offset = 1;
                         }