diff --git a/operator-binary.go b/operator-binary.go
index 13d2307..cfdc3a8 100644
--- a/operator-binary.go
+++ b/operator-binary.go
@@ -11,7 +11,7 @@ func newBinNotTerm(tk *Token) (inst *term) {
 		tk:       *tk,
 		children: make([]*term, 0, 1),
 		position: posPrefix,
-		priority: priNot,
+		priority: priBinary,
 		evalFunc: evalBinaryNot,
 	}
 }
@@ -39,7 +39,7 @@ func newBinAndTerm(tk *Token) (inst *term) {
 		tk:       *tk,
 		children: make([]*term, 0, 2),
 		position: posInfix,
-		priority: priAnd,
+		priority: priBinary,
 		evalFunc: evalBinaryAnd,
 	}
 }
@@ -71,7 +71,7 @@ func newBinOrTerm(tk *Token) (inst *term) {
 		tk:       *tk,
 		children: make([]*term, 0, 2),
 		position: posInfix,
-		priority: priOr,
+		priority: priBinary,
 		evalFunc: evalBinaryOr,
 	}
 }
diff --git a/term.go b/term.go
index 457e1c2..11e887f 100644
--- a/term.go
+++ b/term.go
@@ -19,6 +19,7 @@ const (
 	priAnd
 	priNot
 	priRelational
+	priBinary
 	priSum
 	priProduct
 	priFraction