diff --git a/ports/zephyr/mpconfigport.h b/ports/zephyr/mpconfigport.h
index f6b78e64f0..6f55b0d788 100644
--- a/ports/zephyr/mpconfigport.h
+++ b/ports/zephyr/mpconfigport.h
@@ -61,6 +61,7 @@
 #define MICROPY_PY_BUILTINS_HELP_TEXT zephyr_help_text
 #define MICROPY_PY_ARRAY_SLICE_ASSIGN (1)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
+#define MICROPY_PY_MATH_POW_FIX_NAN (1)
 #define MICROPY_PY_MACHINE          (1)
 #define MICROPY_PY_MACHINE_INCLUDEFILE "ports/zephyr/modmachine.c"
 #define MICROPY_PY_MACHINE_I2C      (1)
diff --git a/ports/zephyr/mpconfigport_minimal.h b/ports/zephyr/mpconfigport_minimal.h
index c802ba5254..2744119204 100644
--- a/ports/zephyr/mpconfigport_minimal.h
+++ b/ports/zephyr/mpconfigport_minimal.h
@@ -50,6 +50,7 @@
 #define MICROPY_LONGINT_IMPL (MICROPY_LONGINT_IMPL_LONGLONG)
 #define MICROPY_FLOAT_IMPL (MICROPY_FLOAT_IMPL_FLOAT)
 #define MICROPY_PY_BUILTINS_COMPLEX (0)
+#define MICROPY_PY_MATH_POW_FIX_NAN (1)
 
 // These features are enabled to get the test suite passing.
 #define MICROPY_FULL_CHECKS         (1)