diff --git a/plugins/sudoers/alias.c b/plugins/sudoers/alias.c
index 14ed9bf3d..86ee5cc5d 100644
--- a/plugins/sudoers/alias.c
+++ b/plugins/sudoers/alias.c
@@ -44,7 +44,7 @@
 #include "sudoers.h"
 #include "parse.h"
 #include "redblack.h"
-#include <gram.h>
+#include "gram.h"
 
 /*
  * Globals
diff --git a/plugins/sudoers/defaults.c b/plugins/sudoers/defaults.c
index c0943a9cd..2b0fa8009 100644
--- a/plugins/sudoers/defaults.c
+++ b/plugins/sudoers/defaults.c
@@ -46,7 +46,7 @@
 
 #include "sudoers.h"
 #include "parse.h"
-#include <gram.h>
+#include "gram.h"
 
 /*
  * For converting between syslog numbers and strings.
diff --git a/plugins/sudoers/defaults.h b/plugins/sudoers/defaults.h
index 05e2b6f49..eb13c3da0 100644
--- a/plugins/sudoers/defaults.h
+++ b/plugins/sudoers/defaults.h
@@ -22,7 +22,7 @@
 #ifndef _SUDO_DEFAULTS_H
 #define _SUDO_DEFAULTS_H
 
-#include <def_data.h>
+#include "def_data.h"
 
 struct list_member {
     char *value;
diff --git a/plugins/sudoers/match.c b/plugins/sudoers/match.c
index 618c70ad0..d43a119f4 100644
--- a/plugins/sudoers/match.c
+++ b/plugins/sudoers/match.c
@@ -76,7 +76,7 @@
 
 #include "sudoers.h"
 #include "parse.h"
-#include <gram.h>
+#include "gram.h"
 
 #ifndef HAVE_FNMATCH
 # include "compat/fnmatch.h"
diff --git a/plugins/sudoers/parse.c b/plugins/sudoers/parse.c
index a045c6f92..6a8fa2bed 100644
--- a/plugins/sudoers/parse.c
+++ b/plugins/sudoers/parse.c
@@ -45,7 +45,7 @@
 #include "sudoers.h"
 #include "parse.h"
 #include "lbuf.h"
-#include <gram.h>
+#include "gram.h"
 
 /* Characters that must be quoted in sudoers */
 #define SUDOERS_QUOTED	":\\,=#\""
diff --git a/plugins/sudoers/testsudoers.c b/plugins/sudoers/testsudoers.c
index a2021a58a..e9a23107d 100644
--- a/plugins/sudoers/testsudoers.c
+++ b/plugins/sudoers/testsudoers.c
@@ -65,7 +65,7 @@
 #include "sudoers.h"
 #include "interfaces.h"
 #include "parse.h"
-#include <gram.h>
+#include "gram.h"
 
 #ifndef HAVE_FNMATCH
 # include "compat/fnmatch.h"
diff --git a/plugins/sudoers/toke.c b/plugins/sudoers/toke.c
index cfd5cfa4d..edb1e5934 100644
--- a/plugins/sudoers/toke.c
+++ b/plugins/sudoers/toke.c
@@ -1474,7 +1474,7 @@ char *yytext;
 #include "sudoers.h"
 #include "parse.h"
 #include "toke.h"
-#include <gram.h>
+#include "gram.h"
 
 extern YYSTYPE yylval;
 extern int parse_error;
diff --git a/plugins/sudoers/toke.l b/plugins/sudoers/toke.l
index 769ac5b3c..e15c1fb30 100644
--- a/plugins/sudoers/toke.l
+++ b/plugins/sudoers/toke.l
@@ -70,7 +70,7 @@
 #include "sudoers.h"
 #include "parse.h"
 #include "toke.h"
-#include <gram.h>
+#include "gram.h"
 
 extern YYSTYPE yylval;
 extern int parse_error;
diff --git a/plugins/sudoers/toke_util.c b/plugins/sudoers/toke_util.c
index dca7a48fe..5235e38a5 100644
--- a/plugins/sudoers/toke_util.c
+++ b/plugins/sudoers/toke_util.c
@@ -52,7 +52,7 @@
 #include "sudoers.h"
 #include "parse.h"
 #include "toke.h"
-#include <gram.h>
+#include "gram.h"
 
 static int arg_len = 0;
 static int arg_size = 0;
diff --git a/plugins/sudoers/visudo.c b/plugins/sudoers/visudo.c
index 2bfc2da0d..da7ea7ccf 100644
--- a/plugins/sudoers/visudo.c
+++ b/plugins/sudoers/visudo.c
@@ -83,7 +83,7 @@
 #include "redblack.h"
 #include "gettext.h"
 #include "sudoers_version.h"
-#include <gram.h>
+#include "gram.h"
 
 struct sudoersfile {
     struct sudoersfile *prev, *next;