diff --git a/src/ipa/libipa/agc_mean_luminance.cpp b/src/ipa/libipa/agc_mean_luminance.cpp
index d37a9b66..ebdb4d75 100644
--- a/src/ipa/libipa/agc_mean_luminance.cpp
+++ b/src/ipa/libipa/agc_mean_luminance.cpp
@@ -467,12 +467,20 @@ double AgcMeanLuminance::constraintClampGain(uint32_t constraintModeIndex,
 				 hist.interQuantileMean(constraint.qLo, constraint.qHi);
 
 		if (constraint.bound == AgcConstraint::Bound::Lower &&
-		    newGain > gain)
+		    newGain > gain) {
 			gain = newGain;
+			LOG(AgcMeanLuminance, Debug)
+				<< "Apply lower bound: " << gain << " to "
+				<< newGain;
+		}
 
 		if (constraint.bound == AgcConstraint::Bound::Upper &&
-		    newGain < gain)
+		    newGain < gain) {
 			gain = newGain;
+			LOG(AgcMeanLuminance, Debug)
+				<< "Apply upper bound: " << gain << " to "
+				<< newGain;
+		}
 	}
 
 	return gain;