diff --git a/src/event_exec.c b/src/event_exec.c
index 7369906e..f5926d00 100644
--- a/src/event_exec.c
+++ b/src/event_exec.c
@@ -10,6 +10,8 @@
 #include <config.h>
 #endif
 
+#include <string.h>
+#include <errno.h>
 
 #ifndef _WIN32
 #include <sys/wait.h>
diff --git a/src/event_log.c b/src/event_log.c
index d51fc637..6042cc85 100644
--- a/src/event_log.c
+++ b/src/event_log.c
@@ -10,6 +10,8 @@
 #include <config.h>
 #endif
 
+#include <string.h>
+
 #include "event.h"
 #include "logging.h"
 #define CATMODULE "event_log"
diff --git a/src/event_url.c b/src/event_url.c
index 86b8feed..ab2b9107 100644
--- a/src/event_url.c
+++ b/src/event_url.c
@@ -10,6 +10,7 @@
 #include <config.h>
 #endif
 
+#include <string.h>
 #include <curl/curl.h>
 
 #include "event.h"