diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp
index da705b14754c..47a6f7b26744 100644
--- a/src/ipa/rkisp1/algorithms/agc.cpp
+++ b/src/ipa/rkisp1/algorithms/agc.cpp
@@ -175,7 +175,7 @@ void Agc::prepare(IPAContext &context, const uint32_t frame,
 	/* Set an average weighted histogram. */
 	Span<uint8_t> weights{
 		params->meas.hst_config.hist_weight,
-		context.hw->numHistogramBins
+		context.hw->numHistogramWeights
 	};
 	std::fill(weights.begin(), weights.end(), 1);
 	/* Step size can't be less than 3. */