fix compiler warning
diff --git a/src/rp2_common/hardware_dma/include/hardware/dma.h b/src/rp2_common/hardware_dma/include/hardware/dma.h
index 2ae64d5..316c558 100644
--- a/src/rp2_common/hardware_dma/include/hardware/dma.h
+++ b/src/rp2_common/hardware_dma/include/hardware/dma.h
@@ -578,8 +578,8 @@
#if PICO_RP2040
panic_unsupported();
#else
- static_assert(DMA_CH0_TRANS_COUNT_MODE_VALUE_ENDLESS == 0xf);
- static_assert(DMA_CH0_TRANS_COUNT_MODE_LSB == 28);
+ static_assert(DMA_CH0_TRANS_COUNT_MODE_VALUE_ENDLESS == 0xf, "");
+ static_assert(DMA_CH0_TRANS_COUNT_MODE_LSB == 28, "");
return 0xffffffffu;
#endif
}