diff --git a/Source/CursesDialog/form/frm_driver.c b/Source/CursesDialog/form/frm_driver.c
index 3a825f00c..6e1af0166 100644
--- a/Source/CursesDialog/form/frm_driver.c
+++ b/Source/CursesDialog/form/frm_driver.c
@@ -37,7 +37,7 @@
  #undef _XOPEN_SOURCE_EXTENDED
 #endif
 
-// AIX seems to define this
+/* AIX seems to define this */
 #undef lines
 #undef columns