diff --git a/trampoline/encryption.c b/trampoline/encryption.c
index ff665ff..4f11e77 100644
--- a/trampoline/encryption.c
+++ b/trampoline/encryption.c
@@ -16,6 +16,7 @@
  */
 
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <ctype.h>
 #include <stdio.h>
diff --git a/trampoline_encmnt/encmnt.c b/trampoline_encmnt/encmnt.c
index 2dafe29..3bcbae2 100644
--- a/trampoline_encmnt/encmnt.c
+++ b/trampoline_encmnt/encmnt.c
@@ -15,6 +15,7 @@
  * along with MultiROM.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
diff --git a/trampoline_encmnt/pw_ui.c b/trampoline_encmnt/pw_ui.c
index ff405f4..5b71276 100644
--- a/trampoline_encmnt/pw_ui.c
+++ b/trampoline_encmnt/pw_ui.c
@@ -15,6 +15,7 @@
  * along with MultiROM.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <stdio.h>