diff --git a/src/cares_wrap.cc b/src/cares_wrap.cc
index a06f4f407cdd..8f69df83133f 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 b3fa3e8d9a07..46318e39c976 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 92e98e2eb2ed..0f95ccca4771 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 2a524153a29d..525aa4df2bcf 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 c696404849c9..ad708c9ed28d 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 e7d97dc48425..4f4d7c46d70d 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 {