diff --git a/src/syntax.c b/src/syntax.c
index 595befc..fc2710a 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -7432,16 +7432,16 @@
  * Note that this table is used by ALL buffers.  This is required because the
  * GUI can redraw at any time for any buffer.
  */
-garray_T	term_attr_table = {0, 0, 0, 0, NULL};
+static garray_T	term_attr_table = {0, 0, 0, 0, NULL};
 
 #define TERM_ATTR_ENTRY(idx) ((attrentry_T *)term_attr_table.ga_data)[idx]
 
-garray_T	cterm_attr_table = {0, 0, 0, 0, NULL};
+static garray_T	cterm_attr_table = {0, 0, 0, 0, NULL};
 
 #define CTERM_ATTR_ENTRY(idx) ((attrentry_T *)cterm_attr_table.ga_data)[idx]
 
 #ifdef FEAT_GUI
-garray_T	gui_attr_table = {0, 0, 0, 0, NULL};
+static garray_T	gui_attr_table = {0, 0, 0, 0, NULL};
 
 #define GUI_ATTR_ENTRY(idx) ((attrentry_T *)gui_attr_table.ga_data)[idx]
 #endif