diff --git a/build/cmake/config.h.in b/build/cmake/config.h.in
index 21561b2..c5d4d30 100644
--- a/build/cmake/config.h.in
+++ b/build/cmake/config.h.in
@@ -91,6 +91,9 @@
 /* Define to 1 if you have the <netinet/in.h> header file. */
 #cmakedefine HAVE_NETINET_IN_H 1
 
+/* Define to 1 if you have the <signal.h> header file. */
+#cmakedefine HAVE_SIGNAL_H 1
+
 /* Define to 1 if you have the <stdint.h> header file. */
 #cmakedefine HAVE_STDINT_H 1