diff --git a/src/mame/drivers/p8k.cpp b/src/mame/drivers/p8k.cpp
index a5302baf1aa..c64edb12f8f 100644
--- a/src/mame/drivers/p8k.cpp
+++ b/src/mame/drivers/p8k.cpp
@@ -473,7 +473,7 @@ MACHINE_CONFIG_START(p8k_state::p8k)
 	m_pio2->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
 	m_pio2->in_pa_callback().set_ioport("DSW");
 
-	I8272A(config, m_i8272, 16_MHz_XTAL / 8, true);
+	I8272A(config, m_i8272, 16_MHz_XTAL / 2, true);
 	m_i8272->drq_wr_callback().set("dma", FUNC(z80dma_device::rdy_w));
 	MCFG_FLOPPY_DRIVE_ADD("i8272:0", p8k_floppies, "525hd", floppy_image_device::default_floppy_formats)
 	MCFG_FLOPPY_DRIVE_ADD("i8272:1", p8k_floppies, "525hd", floppy_image_device::default_floppy_formats)