diff --git a/compiler/plugins/input/TOSA/InputConversion/Converti48Toi64.cpp b/compiler/plugins/input/TOSA/InputConversion/Converti48Toi64.cpp
index eea5386..06725dc 100644
--- a/compiler/plugins/input/TOSA/InputConversion/Converti48Toi64.cpp
+++ b/compiler/plugins/input/TOSA/InputConversion/Converti48Toi64.cpp
@@ -112,7 +112,7 @@
       TypeConverter::SignatureConversion result(newRegion->getNumArguments());
       (void)getTypeConverter()->convertSignatureArgs(
           newRegion->getArgumentTypes(), result);
-      rewriter.applySignatureConversion(newRegion, result);
+      rewriter.applySignatureConversion(&newRegion->front(), result);
     }
     Operation *newOp = rewriter.create(state);
     rewriter.replaceOp(op, newOp->getResults());
diff --git a/compiler/plugins/input/TOSA/InputConversion/StripSignedness.cpp b/compiler/plugins/input/TOSA/InputConversion/StripSignedness.cpp
index dc3ba5b..d9097e3 100644
--- a/compiler/plugins/input/TOSA/InputConversion/StripSignedness.cpp
+++ b/compiler/plugins/input/TOSA/InputConversion/StripSignedness.cpp
@@ -66,7 +66,7 @@
       TypeConverter::SignatureConversion result(newRegion->getNumArguments());
       (void)getTypeConverter()->convertSignatureArgs(
           newRegion->getArgumentTypes(), result);
-      rewriter.applySignatureConversion(newRegion, result);
+      rewriter.applySignatureConversion(&newRegion->front(), result);
     }
     Operation *newOp = rewriter.create(state);
     rewriter.replaceOp(op, newOp->getResults());