diff --git a/common/base64.c b/common/base64.c
index 0e00c3236..f806f4e24 100644
--- a/common/base64.c
+++ b/common/base64.c
@@ -14,24 +14,3 @@ char *b64_encode(const tal_t *ctx, const u8 *data, size_t len)
 								len, sodium_base64_VARIANT_ORIGINAL);
 	return str;
 }
-
-u8 *b64_decode(const tal_t *ctx, const char *str, size_t len)
-{
-	size_t bin_len = len + 1;
-
-	u8 *ret = tal_arr(ctx, u8, bin_len);
-
-	if (!sodium_base642bin(ret,
-				tal_count(ret),
-				(const char * const)str,
-				len,
-				NULL,
-				&bin_len,
-				NULL,
-				sodium_base64_VARIANT_ORIGINAL))
-			return tal_free(ret);
-
-	ret[bin_len] = 0;
-	tal_resize(&ret, bin_len + 1);
-	return ret;
-}
diff --git a/common/base64.h b/common/base64.h
index 065a1af6b..dee4510cd 100644
--- a/common/base64.h
+++ b/common/base64.h
@@ -5,6 +5,5 @@
 #include <ccan/tal/tal.h>
 
 char *b64_encode(const tal_t *ctx, const u8 *data, size_t len);
-u8 *b64_decode(const tal_t *ctx, const char *str, size_t len);
 
 #endif /* LIGHTNING_COMMON_BASE64_H */