diff --git a/src/posix/platform/alarm.c b/src/posix/platform/alarm.c
index dc442db1e..c61bb8dc8 100644
--- a/src/posix/platform/alarm.c
+++ b/src/posix/platform/alarm.c
@@ -28,6 +28,7 @@
 
 #include "platform-posix.h"
 
+#include <assert.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/src/posix/platform/frame_queue.cpp b/src/posix/platform/frame_queue.cpp
index 5bfd6fa1f..783e71a50 100644
--- a/src/posix/platform/frame_queue.cpp
+++ b/src/posix/platform/frame_queue.cpp
@@ -109,7 +109,9 @@ exit:
 } // namespace ot
 
 #if SELF_TEST
+#include <stdio.h>
 #include <stdlib.h>
+
 void TestSingle()
 {
     otError        error;
diff --git a/src/posix/platform/logging.c b/src/posix/platform/logging.c
index 37712245a..adf35a42c 100644
--- a/src/posix/platform/logging.c
+++ b/src/posix/platform/logging.c
@@ -29,12 +29,11 @@
 #include "platform-posix.h"
 #include <openthread-core-config.h>
 
-#include <ctype.h>
+#include <assert.h>
 #include <inttypes.h>
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
-#include <string.h>
 #include <syslog.h>
 
 #include <openthread/platform/logging.h>
diff --git a/src/posix/platform/misc.c b/src/posix/platform/misc.c
index 24bf0897a..86e36a150 100644
--- a/src/posix/platform/misc.c
+++ b/src/posix/platform/misc.c
@@ -28,6 +28,7 @@
 
 #include "platform-posix.h"
 
+#include <assert.h>
 #include <setjmp.h>
 #include <unistd.h>
 
diff --git a/src/posix/platform/platform-posix.h b/src/posix/platform/platform-posix.h
index 403516236..f9907214a 100644
--- a/src/posix/platform/platform-posix.h
+++ b/src/posix/platform/platform-posix.h
@@ -38,21 +38,8 @@
 #include <openthread-core-config.h>
 #include <openthread/config.h>
 
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <arpa/inet.h>
-#include <fcntl.h>
-#include <netinet/in.h>
-#include <poll.h>
 #include <sys/select.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
 #include <sys/time.h>
-#include <unistd.h>
 
 #include <openthread/instance.h>
 
diff --git a/src/posix/platform/radio_spinel.cpp b/src/posix/platform/radio_spinel.cpp
index 398253782..db3fc3360 100644
--- a/src/posix/platform/radio_spinel.cpp
+++ b/src/posix/platform/radio_spinel.cpp
@@ -48,6 +48,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <sys/resource.h>
+#include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/wait.h>
 #include <syslog.h>
diff --git a/src/posix/platform/settings.cpp b/src/posix/platform/settings.cpp
index f0de65719..f482144f4 100644
--- a/src/posix/platform/settings.cpp
+++ b/src/posix/platform/settings.cpp
@@ -35,9 +35,13 @@
 #include "platform-posix.h"
 
 #include <assert.h>
+#include <fcntl.h>
 #include <inttypes.h>
 #include <stddef.h>
+#include <stdio.h>
+#include <string.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include <openthread/platform/misc.h>
 #include <openthread/platform/settings.h>
diff --git a/src/posix/platform/sim.c b/src/posix/platform/sim.c
index a5301e110..2460165ab 100644
--- a/src/posix/platform/sim.c
+++ b/src/posix/platform/sim.c
@@ -34,8 +34,12 @@
 
 #include "platform-posix.h"
 
+#include <arpa/inet.h>
 #include <stddef.h>
+#include <stdio.h>
+#include <string.h>
 #include <sys/select.h>
+#include <unistd.h>
 
 #if OPENTHREAD_POSIX_VIRTUAL_TIME
 
diff --git a/src/posix/platform/system.c b/src/posix/platform/system.c
index acfe5ae0b..e83392172 100644
--- a/src/posix/platform/system.c
+++ b/src/posix/platform/system.c
@@ -41,6 +41,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <openthread/tasklet.h>
 #include <openthread/platform/alarm-milli.h>
diff --git a/src/posix/platform/udp.cpp b/src/posix/platform/udp.cpp
index 6438dd3a0..03d4f5b16 100644
--- a/src/posix/platform/udp.cpp
+++ b/src/posix/platform/udp.cpp
@@ -39,9 +39,13 @@
 #include "platform-posix.h"
 
 #include <arpa/inet.h>
+#include <assert.h>
 #include <net/if.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/select.h>
+#include <unistd.h>
 
 #include <openthread/udp.h>
 #include <openthread/platform/udp.h>