diff --git a/artiq/coredevice/ad53xx.py b/artiq/coredevice/ad53xx.py
index 0abfd76d9..f09323cc5 100644
--- a/artiq/coredevice/ad53xx.py
+++ b/artiq/coredevice/ad53xx.py
@@ -17,6 +17,12 @@ from artiq.coredevice.ttl import TTLOut
 from artiq.coredevice.spi2 import *
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
 SPI_AD53XX_CONFIG = (0*SPI_OFFLINE | 1*SPI_END |
                      0*SPI_INPUT | 0*SPI_CS_POLARITY |
                      0*SPI_CLK_POLARITY | 1*SPI_CLK_PHASE |
diff --git a/artiq/coredevice/ad9912.py b/artiq/coredevice/ad9912.py
index c11b295c2..e563fb823 100644
--- a/artiq/coredevice/ad9912.py
+++ b/artiq/coredevice/ad9912.py
@@ -10,6 +10,12 @@ from artiq.coredevice.urukul import *
 from artiq.coredevice.ttl import TTLOut
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
 @nac3
 class AD9912:
     """
diff --git a/artiq/coredevice/adf5356.py b/artiq/coredevice/adf5356.py
index e783c8088..bb02ee8ba 100644
--- a/artiq/coredevice/adf5356.py
+++ b/artiq/coredevice/adf5356.py
@@ -20,6 +20,12 @@ from artiq.coredevice.spi2 import *
 from artiq.coredevice.adf5356_reg import *
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
 
 SPI_CONFIG = (
     0 * SPI_OFFLINE
diff --git a/artiq/coredevice/mirny.py b/artiq/coredevice/mirny.py
index 9a87dc936..ea18ef881 100644
--- a/artiq/coredevice/mirny.py
+++ b/artiq/coredevice/mirny.py
@@ -10,6 +10,12 @@ from artiq.coredevice.core import Core
 from artiq.coredevice.spi2 import *
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
 SPI_CONFIG = (
     0 * SPI_OFFLINE
     | 0 * SPI_END
diff --git a/artiq/coredevice/spi2.py b/artiq/coredevice/spi2.py
index 3b0147a6a..657cb4cf8 100644
--- a/artiq/coredevice/spi2.py
+++ b/artiq/coredevice/spi2.py
@@ -14,6 +14,13 @@ from artiq.coredevice.core import Core
 from artiq.coredevice.rtio import rtio_output, rtio_input_data
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
+
 __all__ = [
     "SPI_DATA_ADDR", "SPI_CONFIG_ADDR",
     "SPI_OFFLINE", "SPI_END", "SPI_INPUT",
diff --git a/artiq/coredevice/urukul.py b/artiq/coredevice/urukul.py
index f2796a581..ed20b962b 100644
--- a/artiq/coredevice/urukul.py
+++ b/artiq/coredevice/urukul.py
@@ -8,6 +8,13 @@ from artiq.coredevice.spi2 import *
 from artiq.coredevice.ttl import TTLOut
 
 
+# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/189
+@nac3
+class ValueError(Exception):
+    pass
+
+
+
 SPI_CONFIG = (0 * SPI_OFFLINE | 0 * SPI_END |
               0 * SPI_INPUT | 1 * SPI_CS_POLARITY |
               0 * SPI_CLK_POLARITY | 0 * SPI_CLK_PHASE |