diff --git a/validat1.cpp b/validat1.cpp
index 3e141409..9b98d385 100644
--- a/validat1.cpp
+++ b/validat1.cpp
@@ -1199,7 +1199,7 @@ bool TestSecBlock()
 		temp &= (block.size() == SIZE*2);
 
 		for (size_t i = 0; i < block.size()/2; i++)
-			temp &= (block[i] == 0xaaaaaaaaaaaaaaaa);
+			temp &= (block[i] == W64LIT(0xaaaaaaaaaaaaaaaa));
 
 		for (size_t i = block.size()/2; i < block.size(); i++)
 			temp &= (block[i] == 0);