diff --git a/liba/src/memcpy.c b/liba/src/memcpy.c
index 90d05b266..51b531679 100644
--- a/liba/src/memcpy.c
+++ b/liba/src/memcpy.c
@@ -1,5 +1,8 @@
 #include <string.h>
 
+// Work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51205
+void * memcpy(void * dst, const void * src, size_t n) __attribute__((externally_visible));
+
 void * memcpy(void * dst, const void * src, size_t n) {
   char * destination = (char *)dst;
   char * source = (char *)src;
diff --git a/liba/src/memset.c b/liba/src/memset.c
index 75cd1d5d6..45f1f8947 100644
--- a/liba/src/memset.c
+++ b/liba/src/memset.c
@@ -1,5 +1,8 @@
 #include <string.h>
 
+// Work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51205
+void * memset(void * b, int c, size_t len) __attribute__((externally_visible));
+
 void * memset(void * b, int c, size_t len) {
   char * destination = (char *)b;
   while (len--) {