diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp
index 9980b8bd..887b850d 100644
--- a/src/libcamera/pipeline/ipu3/cio2.cpp
+++ b/src/libcamera/pipeline/ipu3/cio2.cpp
@@ -281,6 +281,13 @@ V4L2SubdeviceFormat CIO2Device::getSensorFormat(const std::vector<unsigned int>
 				continue;
 
 			float ratio = static_cast<float>(sz.width) / sz.height;
+			/*
+			 * Comparing ratios with a single precision is enough.
+			 * This avoids the selection of a frame size which is
+			 * 2x or 3x than the requested size, having a slightly
+			 * better ratio w.r.t native resolution ratio.
+			 */
+			ratio = static_cast<unsigned int>(ratio * 10) / 10.0;
 			float ratioDiff = fabsf(ratio - desiredRatio);
 			unsigned int area = sz.width * sz.height;
 			unsigned int areaDiff = area - desiredArea;