diff --git a/lang/b/compiler/b1.c b/lang/b/compiler/b1.c
index 30ce5c7f7..e959e797b 100644
--- a/lang/b/compiler/b1.c
+++ b/lang/b/compiler/b1.c
@@ -291,7 +291,7 @@ rcexpr(struct tnode *tr)
 
 	case EXCLA:
 		rcexpr(tr->tr1);
-		C_tne();
+		C_teq();
 		return;
 
 	case NEG: