diff --git a/lib/client_impl.c b/lib/client_impl.c
index 6be1c01..f88cfe3 100644
--- a/lib/client_impl.c
+++ b/lib/client_impl.c
@@ -63,7 +63,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #define LOG_ERROR fprintf(stderr, "ERROR: %s \n", error_string)
 #endif
 
-#ifdef DO_TRACE
+#if DO_TRACE
 #define TRACE(...) fprintf(stderr, __VA_ARGS__)
 #else
 #define TRACE(...)