diff --git a/src/cares_wrap.cc b/src/cares_wrap.cc
index b8da20346692c3..da3083a9ce3673 100644
--- a/src/cares_wrap.cc
+++ b/src/cares_wrap.cc
@@ -29,7 +29,6 @@
 #include "uv.h"
 
 #include <errno.h>
-#include <stdlib.h>
 #include <string.h>
 #include <vector>
 #include <unordered_set>
diff --git a/src/fs_event_wrap.cc b/src/fs_event_wrap.cc
index 85a09060a11edc..e37c82516f194a 100644
--- a/src/fs_event_wrap.cc
+++ b/src/fs_event_wrap.cc
@@ -26,7 +26,6 @@
 #include "handle_wrap.h"
 #include "string_bytes.h"
 
-#include <stdlib.h>
 
 namespace node {
 
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 9b26a12fc4b46f..4a12a3acb59f2d 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -46,7 +46,6 @@
 #include <errno.h>
 #include <limits.h>  // INT_MAX
 #include <math.h>
-#include <stdlib.h>
 #include <string.h>
 
 #include <algorithm>
diff --git a/src/spawn_sync.cc b/src/spawn_sync.cc
index 2a524153a29d13..525aa4df2bcf74 100644
--- a/src/spawn_sync.cc
+++ b/src/spawn_sync.cc
@@ -25,7 +25,6 @@
 #include "util.h"
 
 #include <string.h>
-#include <stdlib.h>
 
 
 namespace node {
diff --git a/src/stream_wrap.cc b/src/stream_wrap.cc
index 27fe48d1165c75..2a614afffde591 100644
--- a/src/stream_wrap.cc
+++ b/src/stream_wrap.cc
@@ -32,7 +32,6 @@
 #include "udp_wrap.h"
 #include "util-inl.h"
 
-#include <stdlib.h>  // abort()
 #include <string.h>  // memcpy()
 #include <limits.h>  // INT_MAX
 
diff --git a/src/udp_wrap.cc b/src/udp_wrap.cc
index 192f2aeba0642d..a7b56c067b2c2d 100644
--- a/src/udp_wrap.cc
+++ b/src/udp_wrap.cc
@@ -26,7 +26,6 @@
 #include "req_wrap-inl.h"
 #include "util-inl.h"
 
-#include <stdlib.h>
 
 
 namespace node {