diff --git a/kaleid/kernel/ke/idt.c b/kaleid/kernel/ke/idt.c
index 68d5e23..23d881b 100644
--- a/kaleid/kernel/ke/idt.c
+++ b/kaleid/kernel/ke/idt.c
@@ -320,7 +320,7 @@ void _KeHandleISR(ISRFrame_t *regs)
         return; // INTEL RESERVED
 
     // Spurious interrupt handling.
-    if (!(KeGetIrqRegister(0x0b) & (1<<(regs->intNo - 0x20)))) {
+    if (regs->intNo > 0x20 && !(KeGetIrqRegister(0x0b) & (1<<(regs->intNo - 0x20)))) {
        KeSpuriousCount++;
        return;
    }