diff --git a/src/coreclr/jit/fgprofilesynthesis.cpp b/src/coreclr/jit/fgprofilesynthesis.cpp
index b045ef8a23e666..178b067fb46cfc 100644
--- a/src/coreclr/jit/fgprofilesynthesis.cpp
+++ b/src/coreclr/jit/fgprofilesynthesis.cpp
@@ -1389,14 +1389,9 @@ void ProfileSynthesis::GaussSeidelSolver()
             // Note we are using a "point" bound here ("infinity norm") rather than say
             // computing the L2-norm of the entire residual vector.
             //
-            weight_t const smallFractionOfChange = 1e-9 * change;
-            weight_t       relDivisor            = oldWeight;
-            if (relDivisor < smallFractionOfChange)
-            {
-                relDivisor = smallFractionOfChange;
-            }
-
-            weight_t const blockRelResidual = change / relDivisor;
+            // Avoid dividing by zero if oldWeight is very small.
+            //
+            weight_t const blockRelResidual = change / max(oldWeight, 1e-12);
 
             if ((relResidualBlock == nullptr) || (blockRelResidual > relResidual))
             {