diff --git a/src/ipa/rpi/controller/rpi/awb.cpp b/src/ipa/rpi/controller/rpi/awb.cpp
index 8479ae409..365b595ff 100644
--- a/src/ipa/rpi/controller/rpi/awb.cpp
+++ b/src/ipa/rpi/controller/rpi/awb.cpp
@@ -165,7 +165,6 @@ int AwbConfig::read(const libcamera::YamlObject &params)
 			bayes = false;
 		}
 	}
-	fast = params[fast].get<int>(bayes); /* default to fast for Bayesian, otherwise slow */
 	whitepointR = params["whitepoint_r"].get<double>(0.0);
 	whitepointB = params["whitepoint_b"].get<double>(0.0);
 	if (bayes == false)
diff --git a/src/ipa/rpi/controller/rpi/awb.h b/src/ipa/rpi/controller/rpi/awb.h
index 86640f8f8..2fb912541 100644
--- a/src/ipa/rpi/controller/rpi/awb.h
+++ b/src/ipa/rpi/controller/rpi/awb.h
@@ -43,7 +43,6 @@ struct AwbConfig {
 	uint16_t startupFrames;
 	unsigned int convergenceFrames; /* approx number of frames to converge */
 	double speed; /* IIR filter speed applied to algorithm results */
-	bool fast; /* "fast" mode uses a 16x16 rather than 32x32 grid */
 	libcamera::ipa::Pwl ctR; /* function maps CT to r (= R/G) */
 	libcamera::ipa::Pwl ctB; /* function maps CT to b (= B/G) */
 	libcamera::ipa::Pwl ctRInverse; /* inverse of ctR */