diff --git a/src/binary_c_debug.h b/src/binary_c_debug.h
index b11e707f1d2a631e1172b1c14eeaa5fb32df3a2d..4c58a39f82c5329067232d61886bace1f0d14787 100644
--- a/src/binary_c_debug.h
+++ b/src/binary_c_debug.h
@@ -78,7 +78,7 @@
  * the same, but stardata is defined everywhere as a global
  * variable.
  */
-#define Debug_expression ()
+#define Debug_expression (TRUE)
 
 /*
  * If you define Debug_stop_expression, and it is at any time TRUE,