diff --git a/openbsd-compat/regress/Makefile.in b/openbsd-compat/regress/Makefile.in
index c5aae61e2..dd8cdc4b7 100644
--- a/openbsd-compat/regress/Makefile.in
+++ b/openbsd-compat/regress/Makefile.in
@@ -7,7 +7,7 @@ VPATH=@srcdir@
 CC=@CC@
 LD=@LD@
 CFLAGS=@CFLAGS@
-CPPFLAGS=-I. -I.. -I$(srcdir) -I$(srcdir)/.. @CPPFLAGS@ @DEFS@
+CPPFLAGS=-I. -I.. -I../.. -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../.. @CPPFLAGS@ @DEFS@
 EXEEXT=@EXEEXT@
 LIBCOMPAT=../libopenbsd-compat.a
 LIBS=@LIBS@
diff --git a/openbsd-compat/regress/closefromtest.c b/openbsd-compat/regress/closefromtest.c
index 82ffeb9a7..7a69fb2b1 100644
--- a/openbsd-compat/regress/closefromtest.c
+++ b/openbsd-compat/regress/closefromtest.c
@@ -14,6 +14,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include "includes.h"
+
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ -24,8 +26,6 @@
 
 #define NUM_OPENS 10
 
-int closefrom(int);
-
 void
 fail(char *msg)
 {
diff --git a/openbsd-compat/regress/opensslvertest.c b/openbsd-compat/regress/opensslvertest.c
index 5d019b598..43825b24c 100644
--- a/openbsd-compat/regress/opensslvertest.c
+++ b/openbsd-compat/regress/opensslvertest.c
@@ -14,6 +14,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include "includes.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/openbsd-compat/regress/snprintftest.c b/openbsd-compat/regress/snprintftest.c
index 6dc2e222a..a3134db1c 100644
--- a/openbsd-compat/regress/snprintftest.c
+++ b/openbsd-compat/regress/snprintftest.c
@@ -17,6 +17,8 @@
 
 #define BUFSZ 2048
 
+#include "includes.h"
+
 #include <sys/types.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/openbsd-compat/regress/strduptest.c b/openbsd-compat/regress/strduptest.c
index 7f6d779be..8a3ccf771 100644
--- a/openbsd-compat/regress/strduptest.c
+++ b/openbsd-compat/regress/strduptest.c
@@ -14,6 +14,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include "includes.h"
+
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/openbsd-compat/regress/strtonumtest.c b/openbsd-compat/regress/strtonumtest.c
index 50ca5bd22..46bd2b916 100644
--- a/openbsd-compat/regress/strtonumtest.c
+++ b/openbsd-compat/regress/strtonumtest.c
@@ -17,6 +17,8 @@
 
 /* OPENBSD ORIGINAL: regress/lib/libc/strtonum/strtonumtest.c */
 
+#include "includes.h"
+
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/openbsd-compat/regress/utimensattest.c b/openbsd-compat/regress/utimensattest.c
index 24312e5d8..bbc66c485 100644
--- a/openbsd-compat/regress/utimensattest.c
+++ b/openbsd-compat/regress/utimensattest.c
@@ -14,6 +14,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include "includes.h"
+
 #include <sys/types.h>
 #include <sys/stat.h>