diff --git a/clang/lib/Analysis/UnsafeBufferUsage.cpp b/clang/lib/Analysis/UnsafeBufferUsage.cpp
index c064aa30e8aed..c51398698922b 100644
--- a/clang/lib/Analysis/UnsafeBufferUsage.cpp
+++ b/clang/lib/Analysis/UnsafeBufferUsage.cpp
@@ -930,7 +930,7 @@ AST_MATCHER(CallExpr, hasUnsafeSnprintfBuffer) {
       // The array element type must be compatible with `char` otherwise an
       // explicit cast will be needed, which will make this check unreachable.
       // Therefore, the array extent is same as its' bytewise size.
-      if (Size->EvaluateAsConstantExpr(ER, Ctx)) {
+      if (Size->EvaluateAsInt(ER, Ctx)) {
         APSInt EVal = ER.Val.getInt(); // Size must have integer type
 
         return APSInt::compareValues(EVal, APSInt(CAT->getSize(), true)) != 0;