diff --git a/Target.h b/Target.h
index 48fda5523..86109ecec 100644
--- a/Target.h
+++ b/Target.h
@@ -151,6 +151,7 @@ class FingerPrintResults;
 
 #include <list>
 #include <string>
+#include <time.h> /* time_t */
 
 #ifndef INET6_ADDRSTRLEN
 #define INET6_ADDRSTRLEN 46
diff --git a/nmap_error.cc b/nmap_error.cc
index df7f083cd..0974bac85 100644
--- a/nmap_error.cc
+++ b/nmap_error.cc
@@ -135,6 +135,16 @@
 #include "xml.h"
 
 #include <errno.h>
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
 
 extern NmapOps o;
 
diff --git a/nmap_tty.cc b/nmap_tty.cc
index 514d17f96..8f6bc9628 100644
--- a/nmap_tty.cc
+++ b/nmap_tty.cc
@@ -148,6 +148,17 @@
 #endif
 #include <stdlib.h>
 
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+
 #include "nmap_tty.h"
 #include "NmapOps.h"
 
diff --git a/nse_ssl_cert.cc b/nse_ssl_cert.cc
index b6aae7c4c..2c067b8ff 100644
--- a/nse_ssl_cert.cc
+++ b/nse_ssl_cert.cc
@@ -158,6 +158,8 @@
 #define X509_get0_notAfter X509_get_notAfter
 #endif
 
+/* struct tm */
+#include <time.h>
 
 #include "nse_lua.h"
 
diff --git a/osscan.cc b/osscan.cc
index 8bdd60588..03dde8003 100644
--- a/osscan.cc
+++ b/osscan.cc
@@ -139,16 +139,7 @@
 
 #include <errno.h>
 #include <stdarg.h>
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-#  include <sys/time.h>
-# else
-#  include <time.h>
-# endif
-#endif
+#include <time.h>
 
 #include <algorithm>
 #include <list>
diff --git a/output.h b/output.h
index ddbd1d136..b6afc4293 100644
--- a/output.h
+++ b/output.h
@@ -180,6 +180,17 @@ class Target;
 #include <stdarg.h>
 #include <string>
 
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+
 #ifdef WIN32
 /* Show a fatal error explaining that an interface is not Ethernet and won't
    work on Windows. Do nothing if --send-ip (PACKET_SEND_IP_STRONG) was used. */