diff --git a/include/circt/Dialect/FIRRTL/FIRRTLExpressions.td b/include/circt/Dialect/FIRRTL/FIRRTLExpressions.td
index e8e25f49c964..449948634227 100644
--- a/include/circt/Dialect/FIRRTL/FIRRTLExpressions.td
+++ b/include/circt/Dialect/FIRRTL/FIRRTLExpressions.td
@@ -1115,6 +1115,7 @@ def FIntegerConstantOp : FIRRTLOp<"integer", [Pure, ConstantLike]> {
   }];
   let arguments = (ins APSIntAttr:$value);
   let results = (outs FIntegerType:$result);
+  let hasFolder = 1;
   let hasCustomAssemblyFormat = true;
 }
 
diff --git a/lib/Dialect/FIRRTL/FIRRTLFolds.cpp b/lib/Dialect/FIRRTL/FIRRTLFolds.cpp
index 2f4b3735df2f..1ec13dc1735f 100644
--- a/lib/Dialect/FIRRTL/FIRRTLFolds.cpp
+++ b/lib/Dialect/FIRRTL/FIRRTLFolds.cpp
@@ -410,6 +410,11 @@ OpFoldResult StringConstantOp::fold(FoldAdaptor adaptor) {
   return getValueAttr();
 }
 
+OpFoldResult FIntegerConstantOp::fold(FoldAdaptor adaptor) {
+  assert(adaptor.getOperands().empty() && "constant has no operands");
+  return getValueAttr();
+}
+
 //===----------------------------------------------------------------------===//
 // Binary Operators
 //===----------------------------------------------------------------------===//