1 files changed, 1 insertions, 1 deletions
diff --git a/src/op.cc b/src/op.cc
index 893cd834..537f5371 100644
--- a/src/op.cc
+++ b/src/op.cc
@@ -366,7 +366,7 @@ value_t expr_t::op_t::calc(scope_t& scope, ptr_op_t * locus, const int depth)
     break;
 
   case O_COLON:
-    assert(! "We should never calculate an O_COLON operator");
+    assert("We should never calculate an O_COLON operator" == NULL);
     break;
 
   case O_CONS: