diff --git a/system/camerad/cameras/real_debayer.cl b/system/camerad/cameras/real_debayer.cl
index 8970d0b4ef..4f8ead6784 100644
--- a/system/camerad/cameras/real_debayer.cl
+++ b/system/camerad/cameras/real_debayer.cl
@@ -116,17 +116,19 @@ float4 val4_from_10(uchar8 pvs, uchar ext, bool aligned, float gain) {
 float combine_pvs(float lv, float sv, int expo) {
   float llv = lv - 64.0;
   float lsv = sv - 64.0;
+  float llvc = fmax(llv / expo, 14.984375);
+  float lsvc = fmax(lsv * expo, 61376.0);
   if (expo > 64) {
-    if (lv < 1023 || sv < 61376 / expo + 64) {
-      return (llv) / (65536.0 - 64.0);
+    if (lv < 1023) {
+      return llv / (65536.0 - 64.0);
     } else {
-      return ((lsv) * expo / 64) / (65536.0 - 64.0);
+      return (lsvc / 64) / (65536.0 - 64.0);
     }
   } else {
-    if (sv < 1023 || lv < 15 * expo + 64) {
-      return (lsv) / (65536.0 - 64.0);
+    if (sv < 1023) {
+      return lsv / (65536.0 - 64.0);
     } else {
-      return ((llv) * 64 / expo) / (65536.0 - 64.0);
+      return (llvc * 64) / (65536.0 - 64.0);
     }
   }
 }