diff --git a/build-llvm.sh b/build-llvm.sh
index fdde299..f45313f 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -109,7 +109,7 @@ if [ -n "$HOST" ]; then
     fi
 
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_SYSTEM_NAME=Windows"
-    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CROSSCOMPILE=1"
+    CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CROSSCOMPILING=TRUE"
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_C_COMPILER=$HOST-gcc"
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CXX_COMPILER=$HOST-g++"
     CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_RC_COMPILER=$HOST-windres"