diff --git a/balloon.c b/balloon.c
index c7033e3..5f5202c 100644
--- a/balloon.c
+++ b/balloon.c
@@ -96,7 +96,7 @@
     }
 
     if (target <= 0) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "target", "a size");
+        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "target", "a size");
         return;
     }