diff --git a/toolchain/toolchain-external/toolchain-external.mk b/toolchain/toolchain-external/toolchain-external.mk
index 11345cc47f..fd796a05b1 100644
--- a/toolchain/toolchain-external/toolchain-external.mk
+++ b/toolchain/toolchain-external/toolchain-external.mk
@@ -400,6 +400,8 @@ else
 # Custom toolchain
 TOOLCHAIN_EXTERNAL_SITE = $(dir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
 TOOLCHAIN_EXTERNAL_SOURCE = $(notdir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
+# We can't check hashes for custom downloaded toolchains
+BR_NO_CHECK_HASH_FOR += $(TOOLCHAIN_EXTERNAL_SOURCE)
 endif
 
 # In fact, we don't need to download the toolchain, since it is already