diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/json/tst.usdt.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/json/tst.usdt.c
index 307106d903b5..2a54d4974be0 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/json/tst.usdt.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/json/tst.usdt.c
@@ -14,6 +14,8 @@
  */
 
 #include <sys/sdt.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include "usdt.h"
 
 #define	FMT	"{" \
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/nfs/tst.call3.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/nfs/tst.call3.c
index bd89fffca676..dda3ef28c0b0 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/nfs/tst.call3.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/nfs/tst.call3.c
@@ -28,6 +28,7 @@
 
 #include <strings.h>
 #include <rpc/rpc.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <sys/param.h>
 #include <rpcsvc/mount.h>
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.args1.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.args1.c
index 23bbab22f424..28d0677ca5d2 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.args1.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.args1.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <signal.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 int
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.gcc.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.gcc.c
index 69df4723dc9f..b3959c35e8b3 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.gcc.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.gcc.c
@@ -26,6 +26,8 @@
 
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <spawn.h>
 #include <signal.h>
 #include <stdio.h>
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret1.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret1.c
index cfb88a83dc7f..12b3f724cb17 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret1.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret1.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <signal.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret2.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret2.c
index b64aa0515daa..ea5394e120f5 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret2.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.ret2.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <signal.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak1.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak1.c
index 1418f2a3fea4..765c285dd964 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak1.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak1.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <signal.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak2.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak2.c
index bb571d2ea33e..756745d99b1f 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak2.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/pid/tst.weak2.c
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <signal.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 /*
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/syscall/tst.args.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/syscall/tst.args.c
index 209160bd75f1..198d9db01b71 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/syscall/tst.args.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/syscall/tst.args.c
@@ -28,6 +28,7 @@
 
 #include <stdio.h>
 #include <sys/syscall.h>
+#include <unistd.h>
 
 /*ARGSUSED*/
 int
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/usdt/tst.forker.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/usdt/tst.forker.c
index ade7f83b3d53..e229c0c996a8 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/usdt/tst.forker.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/usdt/tst.forker.c
@@ -26,6 +26,10 @@
 
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <stdlib.h>
 #include <unistd.h>
 
 #include "forker.h"