diff --git a/dev/interrupt/riscv_plic/plic.c b/dev/interrupt/riscv_plic/plic.c
index 7127d8a1..b258c4f6 100644
--- a/dev/interrupt/riscv_plic/plic.c
+++ b/dev/interrupt/riscv_plic/plic.c
@@ -20,9 +20,9 @@
 
 #define LOCAL_TRACE 0
 
-// Preallocate space for up to 128 vectors.
+// Preallocate space for up to 256 vectors.
 // If more are needed will need to bump this up or switch to a dynamic scheme.
-#define MAX_IRQS 128
+#define MAX_IRQS 256
 static struct int_handlers {
     int_handler handler;
     void *arg;