diff --git a/src/crypto/chap.c b/src/crypto/chap.c
index 6064a30a6..6bebaca5a 100644
--- a/src/crypto/chap.c
+++ b/src/crypto/chap.c
@@ -21,7 +21,6 @@
 #include <string.h>
 #include <errno.h>
 #include <assert.h>
-#include <malloc.h>
 #include <gpxe/crypto.h>
 #include <gpxe/chap.h>
 
diff --git a/src/drivers/bus/pci.c b/src/drivers/bus/pci.c
index 222f3eeab..2406b1307 100644
--- a/src/drivers/bus/pci.c
+++ b/src/drivers/bus/pci.c
@@ -20,9 +20,9 @@
  */
 
 #include <stdint.h>
+#include <stdlib.h>
 #include <string.h>
 #include <errno.h>
-#include <malloc.h>
 #include <gpxe/tables.h>
 #include <gpxe/device.h>
 #include <gpxe/pci.h>
diff --git a/src/hci/readline.c b/src/hci/readline.c
index a8cc455c3..14dbeafef 100644
--- a/src/hci/readline.c
+++ b/src/hci/readline.c
@@ -17,7 +17,7 @@
  */
 
 #include <string.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <console.h>
 #include <gpxe/editstring.h>
 #include <readline/readline.h>
diff --git a/src/net/dhcpopts.c b/src/net/dhcpopts.c
index e847c81d8..3013b669b 100644
--- a/src/net/dhcpopts.c
+++ b/src/net/dhcpopts.c
@@ -17,10 +17,10 @@
  */
 
 #include <stdint.h>
+#include <stdlib.h>
 #include <byteswap.h>
 #include <errno.h>
 #include <string.h>
-#include <malloc.h>
 #include <assert.h>
 #include <vsprintf.h>
 #include <gpxe/list.h>
diff --git a/src/net/netdevice.c b/src/net/netdevice.c
index 634977f7a..3f8e54bb1 100644
--- a/src/net/netdevice.c
+++ b/src/net/netdevice.c
@@ -17,10 +17,10 @@
  */
 
 #include <stdint.h>
+#include <stdlib.h>
 #include <byteswap.h>
 #include <string.h>
 #include <errno.h>
-#include <malloc.h>
 #include <gpxe/if_ether.h>
 #include <gpxe/pkbuff.h>
 #include <gpxe/tables.h>