diff --git a/pkg/wamr/Makefile.include b/pkg/wamr/Makefile.include
index 254eac4bcd..953bfb45e3 100644
--- a/pkg/wamr/Makefile.include
+++ b/pkg/wamr/Makefile.include
@@ -10,3 +10,6 @@ IWASM_INCLUDES += ${IWASM_ROOT}/include \
 INCLUDES += $(addprefix -I,${IWASM_INCLUDES})
 
 ARCHIVES += $(BINDIR)/libwamr.a
+
+# clang stumbles upon the asm syntax, likely it ignores -mthumb
+TOOLCHAINS_BLACKLIST += llvm