diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp
index 3c9331e3..6ccef301 100644
--- a/src/libcamera/pipeline/ipu3/cio2.cpp
+++ b/src/libcamera/pipeline/ipu3/cio2.cpp
@@ -290,6 +290,11 @@ V4L2SubdeviceFormat CIO2Device::getSensorFormat(const std::vector<unsigned int>
 				continue;
 
 			float ratio = static_cast<float>(sz.width) / sz.height;
+			/*
+			 * Comparing ratios with a single precision digit
+			 * is enough.
+			 */
+			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;