diff --git a/lib/llvm-backend/src/code.rs b/lib/llvm-backend/src/code.rs
index 4398b3548e8..004d0e3867e 100644
--- a/lib/llvm-backend/src/code.rs
+++ b/lib/llvm-backend/src/code.rs
@@ -1151,7 +1151,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
                         builder.build_store(ptr_to_value, value);
                     }
                     GlobalCache::Const { value: _ } => {
-                        unreachable!("cannot set non-mutable globals")
+                        return Err(CodegenError {
+                            message: "global is immutable".to_string(),
+                        });
                     }
                 }
             }
diff --git a/lib/spectests/tests/excludes.txt b/lib/spectests/tests/excludes.txt
index 741aba8c15f..ae3cc7fef57 100644
--- a/lib/spectests/tests/excludes.txt
+++ b/lib/spectests/tests/excludes.txt
@@ -825,7 +825,6 @@ llvm:skip:skip-stack-guard-page.wast:* # Spec running forever or (signal: 4, SIG
 llvm:skip:linking.wast:236 # terminating with uncaught exception of type WasmTrap
 llvm:skip:linking.wast:248 # terminating with uncaught exception of type WasmTrap
 
-llvm:fail:globals.wast:243 # AssertInvalid - caught panic Any
 llvm:fail:i32.wast:243 # AssertReturn - result I32(61374799) ("0x3a8814f") does not match expected I32(32) ("0x20")
 llvm:fail:i32.wast:252 # AssertReturn - result I32(61374816) ("0x3a88160") does not match expected I32(32) ("0x20")
 llvm:fail:i64.wast:243 # AssertReturn - result I64(4356342255) ("0x103a881ef") does not match expected I64(64) ("0x40")