diff --git a/src/modules/systemlib/mcu_version.c b/src/modules/systemlib/mcu_version.c
index d33f04e643..a880a5eaee 100644
--- a/src/modules/systemlib/mcu_version.c
+++ b/src/modules/systemlib/mcu_version.c
@@ -64,19 +64,6 @@
 
 #endif
 
-/** Copy the 96bit MCU Unique ID into the provided pointer */
-void mcu_unique_id(uint32_t *uid_96_bit)
-{
-#ifdef __PX4_NUTTX
-	uid_96_bit[0] = getreg32(STM32_SYSMEM_UID);
-	uid_96_bit[1] = getreg32(STM32_SYSMEM_UID + 4);
-	uid_96_bit[2] = getreg32(STM32_SYSMEM_UID + 8);
-#else
-	uid_96_bit[0] = 0;
-	uid_96_bit[1] = 1;
-	uid_96_bit[2] = 2;
-#endif
-}
 
 int mcu_version(char *rev, char **revstr)
 {
diff --git a/src/modules/systemlib/mcu_version.h b/src/modules/systemlib/mcu_version.h
index 2aca31b99b..579834bacf 100644
--- a/src/modules/systemlib/mcu_version.h
+++ b/src/modules/systemlib/mcu_version.h
@@ -46,15 +46,6 @@ enum MCU_REV {
 	MCU_REV_STM32F4_REV_3 = 0x2001
 };
 
-
-/**
- * Reports the microcontroller unique id.
- *
- * This ID is guaranteed to be unique for every mcu.
- * @param uid_96_bit A uint32_t[3] array to copy the data to.
- */
-__EXPORT void mcu_unique_id(uint32_t *uid_96_bit);
-
 /**
  * Reports the microcontroller version of the main CPU.
  *