diff --git a/LLVM.makefile b/LLVM.makefile
index d002a44..af8a3fc 100644
--- a/LLVM.makefile
+++ b/LLVM.makefile
@@ -110,6 +110,7 @@ $(BUILD_DIR)/compiler-rt.BUILT: $(BUILD_DIR)/llvm.BUILT
 	cd $(BUILD_DIR)/compiler-rt; cmake -G Ninja \
 		-DCMAKE_SYSROOT=${FAASM_SYSROOT} \
 		-DCMAKE_C_COMPILER_WORKS=ON \
+		-DCMAKE_C_COMPILER_TARGET=wasm32-wasi \
 		-DCMAKE_CXX_COMPILER_WORKS=ON \
 		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 		-DCMAKE_TOOLCHAIN_FILE=${FAASM_TOOLCHAIN_FILE} \