diff --git a/yjit/src/codegen.rs b/yjit/src/codegen.rs
index 9419f52894..1e8f046403 100644
--- a/yjit/src/codegen.rs
+++ b/yjit/src/codegen.rs
@@ -8006,6 +8006,12 @@ fn gen_send_dynamic<F: Fn(&mut Assembler) -> Opnd>(
     // Save PC and SP to prepare for dynamic dispatch
     jit_prepare_non_leaf_call(jit, asm);
 
+    // Squash stack canary that might be left over from elsewhere
+    assert_eq!(false, asm.get_leaf_ccall());
+    if cfg!(debug_assertions) {
+        asm.store(asm.ctx.sp_opnd(0), 0.into());
+    }
+
     // Dispatch a method
     let ret = vm_sendish(asm);