diff --git a/examples/chat/chat_main.c b/examples/chat/chat_main.c
index f665104cd..18d176614 100644
--- a/examples/chat/chat_main.c
+++ b/examples/chat/chat_main.c
@@ -43,6 +43,7 @@
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 
+#include <assert.h>
 #include <debug.h>
 #include <errno.h>
 #include <fcntl.h>
diff --git a/examples/nxterm/nxterm_main.c b/examples/nxterm/nxterm_main.c
index 8c9678759..3b3ac72b7 100644
--- a/examples/nxterm/nxterm_main.c
+++ b/examples/nxterm/nxterm_main.c
@@ -34,6 +34,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 
diff --git a/graphics/pdcurs34/nuttx/pdcdisp.c b/graphics/pdcurs34/nuttx/pdcdisp.c
index d711bd6dd..d35dbb752 100644
--- a/graphics/pdcurs34/nuttx/pdcdisp.c
+++ b/graphics/pdcurs34/nuttx/pdcdisp.c
@@ -38,6 +38,7 @@
  ****************************************************************************/
 
 #include <sys/ioctl.h>
+#include <assert.h>
 #include <errno.h>
 
 #ifdef CONFIG_SYSTEM_TERMCURSES
diff --git a/graphics/pdcurs34/nuttx/pdcgetsc.c b/graphics/pdcurs34/nuttx/pdcgetsc.c
index ebe58ffbd..ff2313baf 100644
--- a/graphics/pdcurs34/nuttx/pdcgetsc.c
+++ b/graphics/pdcurs34/nuttx/pdcgetsc.c
@@ -42,6 +42,8 @@
 #endif
 
 #include <sys/ioctl.h>
+#include <assert.h>
+
 #include "pdcnuttx.h"
 
 /****************************************************************************
diff --git a/graphics/pdcurs34/nuttx/pdckbd.c b/graphics/pdcurs34/nuttx/pdckbd.c
index acfcabc81..c2e889ca5 100644
--- a/graphics/pdcurs34/nuttx/pdckbd.c
+++ b/graphics/pdcurs34/nuttx/pdckbd.c
@@ -45,6 +45,7 @@
 #include <sys/types.h>
 #include <sys/select.h>
 #include <unistd.h>
+#include <assert.h>
 
 #include "pdcnuttx.h"
 
diff --git a/netutils/chat/chat.c b/netutils/chat/chat.c
index c13993d9f..dc63938d4 100644
--- a/netutils/chat/chat.c
+++ b/netutils/chat/chat.c
@@ -43,6 +43,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
+#include <assert.h>
 #include <debug.h>
 #include <errno.h>
 #include <poll.h>
diff --git a/netutils/thttpd/thttpd_cgi.c b/netutils/thttpd/thttpd_cgi.c
index 816c014b7..7c6294a4f 100644
--- a/netutils/thttpd/thttpd_cgi.c
+++ b/netutils/thttpd/thttpd_cgi.c
@@ -51,6 +51,7 @@
 #include <string.h>
 #include <signal.h>
 #include <libgen.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>