diff --git a/lib/Dialect/FIRRTL/Transforms/LowerDPI.cpp b/lib/Dialect/FIRRTL/Transforms/LowerDPI.cpp
index 84fddc86e9..610f7ff8b0 100644
--- a/lib/Dialect/FIRRTL/Transforms/LowerDPI.cpp
+++ b/lib/Dialect/FIRRTL/Transforms/LowerDPI.cpp
@@ -97,7 +97,7 @@ LogicalResult LowerDPI::lower() {
     // Construct DPI func op.
     auto firstDPIDecl = getOrCreateDPIFuncDecl(firstDPICallop);
 
-    auto inputTypes = firstDPICallop.getOperandTypes();
+    auto inputTypes = firstDPICallop.getInputs().getTypes();
     auto outputTypes = firstDPICallop.getResultTypes();
 
     ImplicitLocOpBuilder builder(firstDPICallop.getLoc(),
diff --git a/test/Dialect/FIRRTL/lower-dpi.mlir b/test/Dialect/FIRRTL/lower-dpi.mlir
index 86897eedd0..64d6816f13 100644
--- a/test/Dialect/FIRRTL/lower-dpi.mlir
+++ b/test/Dialect/FIRRTL/lower-dpi.mlir
@@ -31,4 +31,12 @@ firrtl.circuit "DPI" {
     firrtl.matchingconnect %out_0, %0 : !firrtl.uint<8>
     firrtl.matchingconnect %out_1, %1 : !firrtl.uint<8>
   }
+
+  // CHECK-LABEL: firrtl.module @DPISignature
+  firrtl.module @DPISignature(in %clock: !firrtl.clock, in %enable: !firrtl.uint<1>, in %in_0: !firrtl.uint<8>, in %in_1: !firrtl.uint<8>) attributes {convention = #firrtl<convention scalarized>} {
+    // CHECK: call @clocked_void
+    // CHECK: call @clocked_void
+    firrtl.int.dpi.call "clocked_void"(%in_0, %in_1) clock %clock enable %enable : (!firrtl.uint<8>, !firrtl.uint<8>) -> ()
+    firrtl.int.dpi.call "clocked_void"(%in_0, %in_1) clock %clock : (!firrtl.uint<8>, !firrtl.uint<8>) -> ()
+  }
 }