diff --git a/toolchain/Config.in b/toolchain/Config.in
index 8f91b23562..30ccbcee7a 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -243,6 +243,16 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_111001
 		   BR2_OPTIMIZE_2 || \
 		   BR2_OPTIMIZE_3
 
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121567
+# error: unable to find a register to spill in class ‘R0_REGS’
+# The bug exists at least since gcc 6.x, so we are assuming it affects
+# all GCC versions.
+config BR2_TOOLCHAIN_HAS_GCC_BUG_121567
+	bool
+	default y if BR2_sh
+	depends on BR2_OPTIMIZE_2 || \
+		   BR2_OPTIMIZE_3
+
 config BR2_TOOLCHAIN_HAS_NATIVE_RPC
 	bool