diff --git a/src/libcamera/sensor/camera_sensor_legacy.cpp b/src/libcamera/sensor/camera_sensor_legacy.cpp
index 792e4b09..fe5664e0 100644
--- a/src/libcamera/sensor/camera_sensor_legacy.cpp
+++ b/src/libcamera/sensor/camera_sensor_legacy.cpp
@@ -156,6 +156,7 @@ private:
 
 CameraSensorLegacy::CameraSensorLegacy(const MediaEntity *entity)
 	: entity_(entity), pad_(UINT_MAX), staticProps_(nullptr),
+	  testPatternMode_(controls::draft::TestPatternModeOff),
 	  bayerFormat_(nullptr), supportHFlips_(false), supportVFlips_(false),
 	  flipsAlterBayerOrder_(false), properties_(properties::properties)
 {
diff --git a/src/libcamera/sensor/camera_sensor_raw.cpp b/src/libcamera/sensor/camera_sensor_raw.cpp
index 55b386ce..b87ec0eb 100644
--- a/src/libcamera/sensor/camera_sensor_raw.cpp
+++ b/src/libcamera/sensor/camera_sensor_raw.cpp
@@ -164,8 +164,10 @@ private:
  */
 
 CameraSensorRaw::CameraSensorRaw(const MediaEntity *entity)
-	: entity_(entity), staticProps_(nullptr), supportHFlips_(false),
-	  supportVFlips_(false), flipsAlterBayerOrder_(false),
+	: entity_(entity), staticProps_(nullptr),
+	  testPatternMode_(controls::draft::TestPatternModeOff),
+	  supportHFlips_(false), supportVFlips_(false),
+	  flipsAlterBayerOrder_(false),
 	  properties_(properties::properties)
 {
 }