diff --git a/src/depth.h b/src/depth.h
index 92ce6e22..05008e05 100644
--- a/src/depth.h
+++ b/src/depth.h
@@ -27,7 +27,8 @@
 
 enum Depth {
   DEPTH_ZERO = 0,
-  DEPTH_MAX = 200  // 100 * OnePly;
+  DEPTH_MAX = 200, // 100 * OnePly;
+  DEPTH_ENSURE_SIGNED = -1
 };
 
 
diff --git a/src/search.cpp b/src/search.cpp
index 5ea75fec..fd5687ea 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1666,7 +1666,7 @@ namespace {
         alpha = bestValue;
 
     // If we are near beta then try to get a cutoff pushing checks a bit further
-    bool deepChecks = depth == -OnePly && staticValue >= beta - PawnValueMidgame / 8;
+    bool deepChecks = (depth == -OnePly && staticValue >= beta - PawnValueMidgame / 8);
 
     // Initialize a MovePicker object for the current position, and prepare
     // to search the moves. Because the depth is <= 0 here, only captures,