diff --git a/cpu/lpc23xx/ldscripts/lpc23xx.ld b/cpu/lpc23xx/ldscripts/lpc23xx.ld
index 35e70ce3fc..5b22980c22 100644
--- a/cpu/lpc23xx/ldscripts/lpc23xx.ld
+++ b/cpu/lpc23xx/ldscripts/lpc23xx.ld
@@ -207,10 +207,6 @@ SECTIONS
     _sram = ORIGIN(ram);
     _eram = ORIGIN(ram) + LENGTH(ram);
 
-    /* Populate information about rom size */
-    _srom = ORIGIN(rom);
-    _erom = ORIGIN(rom) + LENGTH(rom);
-
     .heap1 ALIGN(4) (NOLOAD) :
     {
         _sheap1 = ORIGIN(ram_ethernet);
@@ -250,8 +246,4 @@ SECTIONS
         _sheap3 = . ;
         _eheap3 = ORIGIN(ram_battery) + LENGTH(ram_battery);
     } > ram_battery
-
-    .end_fw (NOLOAD) : ALIGN(4) {
-        _end_fw = . ;
-    } > rom
 }
diff --git a/cpu/lpc23xx/periph/flashpage.c b/cpu/lpc23xx/periph/flashpage.c
index 80bb7c676d..d35ceedcaa 100644
--- a/cpu/lpc23xx/periph/flashpage.c
+++ b/cpu/lpc23xx/periph/flashpage.c
@@ -34,13 +34,6 @@
 typedef void (*IAP)(unsigned int[], unsigned int[]);
 static const IAP IAP_Entry = (IAP)0x7ffffff1;
 
-/**
- * @brief   Memory markers, defined in the linker script
- * @{
- */
-extern uint32_t _end_fw;
-extern uint32_t _erom;
-
 static uint32_t iap(uint32_t code, uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4)
 {
     /* contains parameters for IAP command */
@@ -258,13 +251,3 @@ void flashpage_write(void *target_addr, const void *data, size_t len)
         DEBUG("ERROR: COPY_RAM_TO_FLASH: %u\n", err);
     }
 }
-
-unsigned flashpage_first_free(void)
-{
-    return flashpage_page(&_end_fw) + 1;
-}
-
-unsigned flashpage_last_free(void)
-{
-    return flashpage_page(&_erom) - 1;
-}