diff --git a/agb/gba_mb.ld b/agb/gba_mb.ld
index dd110073..238b5c4c 100644
--- a/agb/gba_mb.ld
+++ b/agb/gba_mb.ld
@@ -4,6 +4,9 @@ OUTPUT_ARCH(arm)
 ENTRY(__start)
 EXTERN(__RUST_INTERRUPT_HANDLER)
 
+EXTERN(__agbabi_memset)
+EXTERN(__agbabi_memcpy)
+
 MEMORY {
     ewram (w!x) : ORIGIN = 0x02000000, LENGTH = 256K
     iwram (w!x) : ORIGIN = 0x03000000, LENGTH = 32K
diff --git a/book/games/pong/gba_mb.ld b/book/games/pong/gba_mb.ld
index dd110073..238b5c4c 100644
--- a/book/games/pong/gba_mb.ld
+++ b/book/games/pong/gba_mb.ld
@@ -4,6 +4,9 @@ OUTPUT_ARCH(arm)
 ENTRY(__start)
 EXTERN(__RUST_INTERRUPT_HANDLER)
 
+EXTERN(__agbabi_memset)
+EXTERN(__agbabi_memcpy)
+
 MEMORY {
     ewram (w!x) : ORIGIN = 0x02000000, LENGTH = 256K
     iwram (w!x) : ORIGIN = 0x03000000, LENGTH = 32K
diff --git a/examples/the-purple-night/gba_mb.ld b/examples/the-purple-night/gba_mb.ld
index dd110073..238b5c4c 100644
--- a/examples/the-purple-night/gba_mb.ld
+++ b/examples/the-purple-night/gba_mb.ld
@@ -4,6 +4,9 @@ OUTPUT_ARCH(arm)
 ENTRY(__start)
 EXTERN(__RUST_INTERRUPT_HANDLER)
 
+EXTERN(__agbabi_memset)
+EXTERN(__agbabi_memcpy)
+
 MEMORY {
     ewram (w!x) : ORIGIN = 0x02000000, LENGTH = 256K
     iwram (w!x) : ORIGIN = 0x03000000, LENGTH = 32K
diff --git a/template/gba_mb.ld b/template/gba_mb.ld
index dd110073..238b5c4c 100644
--- a/template/gba_mb.ld
+++ b/template/gba_mb.ld
@@ -4,6 +4,9 @@ OUTPUT_ARCH(arm)
 ENTRY(__start)
 EXTERN(__RUST_INTERRUPT_HANDLER)
 
+EXTERN(__agbabi_memset)
+EXTERN(__agbabi_memcpy)
+
 MEMORY {
     ewram (w!x) : ORIGIN = 0x02000000, LENGTH = 256K
     iwram (w!x) : ORIGIN = 0x03000000, LENGTH = 32K