diff --git a/boinc/configure.ac b/boinc/configure.ac
index c6698b3..0c52c19 100644
--- a/boinc/configure.ac
+++ b/boinc/configure.ac
@@ -563,6 +563,8 @@ AH_TOP([
 #ifndef BOINC_CONFIG_H
 #define BOINC_CONFIG_H
 
+#include <unistd.h>
+
 /* Version defines are now in version.h */
 #include "version.h"
 
diff --git a/boinc/tools/process_input_template.cpp b/boinc/tools/process_input_template.cpp
index a8fbf4a..c783cf0 100644
--- a/boinc/tools/process_input_template.cpp
+++ b/boinc/tools/process_input_template.cpp
@@ -15,6 +15,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
 
+#include <unistd.h>
 #include <stdio.h>
 #include <string>
 #include <sys/types.h>