diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp
index b69d38c31..2b9cfee21 100644
--- a/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp
+++ b/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp
@@ -14,7 +14,7 @@ using namespace RPiController;
 class CamHelperImx290 : public CamHelper
 {
 public:
-	CamHelperImx290();
+	CamHelperImx290(unsigned int frameIntegrationDiff = kFrameIntegrationDiff);
 	uint32_t gainCode(double gain) const override;
 	double gain(uint32_t gainCode) const override;
 	unsigned int hideFramesStartup() const override;
@@ -25,10 +25,10 @@ private:
 	 * Smallest difference between the frame length and integration time,
 	 * in units of lines.
 	 */
-	static constexpr int frameIntegrationDiff = 2;
+	static constexpr unsigned int kFrameIntegrationDiff = 2;
 };
 
-CamHelperImx290::CamHelperImx290()
+CamHelperImx290::CamHelperImx290(unsigned int frameIntegrationDiff)
 	: CamHelper({}, frameIntegrationDiff)
 {
 }
@@ -61,7 +61,18 @@ static CamHelper *create()
 	return new CamHelperImx290();
 }
 
+static CamHelper *createImx662()
+{
+	/*
+	 * The imx662 requires a frame integration diff of at least 4,
+	 * according to the datasheet, but in practice this didn't prevent
+	 * bad black level values in HCG (high conversion gain) mode.
+	 * So instead, we go with 6 for "safety".
+	 */
+	return new CamHelperImx290(6);
+}
+
 static RegisterCamHelper reg("imx290", &create);
 static RegisterCamHelper reg327("imx327", &create);
 static RegisterCamHelper reg462("imx462", &create);
-static RegisterCamHelper reg662("imx662", &create);
+static RegisterCamHelper reg662("imx662", &createImx662);