diff --git a/llvm/include/llvm/ADT/APInt.h b/llvm/include/llvm/ADT/APInt.h
index 63a138527b32e1..953b2a27b71526 100644
--- a/llvm/include/llvm/ADT/APInt.h
+++ b/llvm/include/llvm/ADT/APInt.h
@@ -109,7 +109,7 @@ class [[nodiscard]] APInt {
   /// \param implicitTrunc allow implicit truncation of non-zero/sign bits of
   ///                      val beyond the range of numBits
   APInt(unsigned numBits, uint64_t val, bool isSigned = false,
-        bool implicitTrunc = true)
+        bool implicitTrunc = false)
       : BitWidth(numBits) {
     if (!implicitTrunc) {
       if (isSigned) {