diff --git a/mlir/lib/Parser/AttributeParser.cpp b/mlir/lib/Parser/AttributeParser.cpp
--- a/mlir/lib/Parser/AttributeParser.cpp
+++ b/mlir/lib/Parser/AttributeParser.cpp
@@ -510,7 +510,7 @@

   // Check to see if we parse the literal from a hex string.
   if (hexStorage.hasValue() &&
-      (eltType.isIntOrFloat() || eltType.isa<ComplexType>()))
+      (eltType.isIntOrIndexOrFloat() || eltType.isa<ComplexType>()))
     return getHexAttr(loc, type);

   // Check that the parsed storage size has the same number of elements to the