diff --git a/armsrc/tlv.c b/armsrc/tlv.c
index 5f3bde2f9..3da03492f 100644
--- a/armsrc/tlv.c
+++ b/armsrc/tlv.c
@@ -1,5 +1,4 @@
 #include <tlv.h>
-#include <stddef.h>
 
 int decode_ber_tlv_item(uint8_t* data, tlvtag* returnedtag)
 {
diff --git a/armsrc/tlv.h b/armsrc/tlv.h
index ae1e71d0f..c90756168 100644
--- a/armsrc/tlv.h
+++ b/armsrc/tlv.h
@@ -3,7 +3,7 @@
 
 #include <stdint.h>
 #include <string.h>
-#include <stdint.h>
+#include <stddef.h>
 
 //structure buffer definitions
 #define TAG_LENGTH 2