diff --git a/tix/porttix-create.cpp b/tix/porttix-create.cpp
index e3eccbbf..114bfa8c 100644
--- a/tix/porttix-create.cpp
+++ b/tix/porttix-create.cpp
@@ -35,6 +35,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <libgen.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/srctix-create.cpp b/tix/srctix-create.cpp
index 6c0d08c7..c8b84d81 100644
--- a/tix/srctix-create.cpp
+++ b/tix/srctix-create.cpp
@@ -35,6 +35,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <libgen.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-build.cpp b/tix/tix-build.cpp
index f3f128bc..3cdbc6fe 100644
--- a/tix/tix-build.cpp
+++ b/tix/tix-build.cpp
@@ -36,6 +36,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-collection.cpp b/tix/tix-collection.cpp
index 876f8627..1ad6801b 100644
--- a/tix/tix-collection.cpp
+++ b/tix/tix-collection.cpp
@@ -34,6 +34,7 @@
 #include <errno.h>
 #include <error.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-execdiff.cpp b/tix/tix-execdiff.cpp
index f113dc2a..41e122e9 100644
--- a/tix/tix-execdiff.cpp
+++ b/tix/tix-execdiff.cpp
@@ -35,6 +35,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <libgen.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-execpatch.cpp b/tix/tix-execpatch.cpp
index 4b229702..e3ceb896 100644
--- a/tix/tix-execpatch.cpp
+++ b/tix/tix-execpatch.cpp
@@ -36,6 +36,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <libgen.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-install.cpp b/tix/tix-install.cpp
index 3ba9bedd..972ed7fa 100644
--- a/tix/tix-install.cpp
+++ b/tix/tix-install.cpp
@@ -36,6 +36,7 @@
 #include <dirent.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix-object-insert.cpp b/tix/tix-object-insert.cpp
index 1e16a1e6..0d362c1e 100644
--- a/tix/tix-object-insert.cpp
+++ b/tix/tix-object-insert.cpp
@@ -31,6 +31,7 @@
 #include <fcntl.h>
 #include <getopt.h>
 #include <limits.h>
+#include <signal.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/tix/tix-rmpatch.cpp b/tix/tix-rmpatch.cpp
index ae02d3b9..efc845c9 100644
--- a/tix/tix-rmpatch.cpp
+++ b/tix/tix-rmpatch.cpp
@@ -36,6 +36,7 @@
 #include <error.h>
 #include <fcntl.h>
 #include <libgen.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/tix/tix.cpp b/tix/tix.cpp
index 82f41ff3..ad0e8ab9 100644
--- a/tix/tix.cpp
+++ b/tix/tix.cpp
@@ -36,6 +36,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>