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-rw-r--r--openpicc/application/pio_irq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/openpicc/application/pio_irq.c b/openpicc/application/pio_irq.c
index 5359bbf..3a753d4 100644
--- a/openpicc/application/pio_irq.c
+++ b/openpicc/application/pio_irq.c
@@ -68,7 +68,7 @@ extern void fiq_handler(void);
/* Will be used in pio_irq_demux_secondary below and contains the PIO_ISR value
* from when the FIQ was raised */
-u_int32_t pio_irq_isr_value;
+volatile u_int32_t pio_irq_isr_value;
/* low-level handler, used by Cstartup_app.S PIOA fast forcing and
personal git repositories of Harald Welte. Your mileage may vary