diff --git a/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp b/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
--- a/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
+++ b/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
@@ -529,8 +529,9 @@
 
     if (decl.getType() && decl.getType() != varType)
       return op->emitOpError()
-             << "expected private (" << varType << ") to be the same type as "
-             << operandName << " declaration (" << decl.getType() << ")";
+             << "expected " << operandName << " (" << varType
+             << ") to be the same type as " << operandName
+             << " declaration (" << decl.getType() << ")";
   }
 
   return success();