diff --git a/regress/unittests/authopt/tests.c b/regress/unittests/authopt/tests.c
index 8c51b380..1f0494f5 100644
--- a/regress/unittests/authopt/tests.c
+++ b/regress/unittests/authopt/tests.c
@@ -11,7 +11,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/regress/unittests/misc/test_argv.c b/regress/unittests/misc/test_argv.c
index 7a28f64e..f0d7afe0 100644
--- a/regress/unittests/misc/test_argv.c
+++ b/regress/unittests/misc/test_argv.c
@@ -10,7 +10,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/regress/unittests/misc/test_convtime.c b/regress/unittests/misc/test_convtime.c
index 5be3ee43..8f9be89f 100644
--- a/regress/unittests/misc/test_convtime.c
+++ b/regress/unittests/misc/test_convtime.c
@@ -10,7 +10,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/regress/unittests/misc/test_expand.c b/regress/unittests/misc/test_expand.c
index c336fb0b..513c69bc 100644
--- a/regress/unittests/misc/test_expand.c
+++ b/regress/unittests/misc/test_expand.c
@@ -10,7 +10,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/regress/unittests/misc/test_parse.c b/regress/unittests/misc/test_parse.c
index dd99068d..727ff3de 100644
--- a/regress/unittests/misc/test_parse.c
+++ b/regress/unittests/misc/test_parse.c
@@ -10,7 +10,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/regress/unittests/misc/tests.c b/regress/unittests/misc/tests.c
index 75013f48..6bd8859b 100644
--- a/regress/unittests/misc/tests.c
+++ b/regress/unittests/misc/tests.c
@@ -10,7 +10,9 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <stdio.h>
+#ifdef HAVE_STDINT_H
 #include <stdint.h>
+#endif
 #include <stdlib.h>
 #include <string.h>