diff --git a/tools/windows-build.sh b/tools/windows-build.sh
index e6ce4a08..63bd58b4 100755
--- a/tools/windows-build.sh
+++ b/tools/windows-build.sh
@@ -217,7 +217,7 @@ configure_wimlib()
 		fi
 		exit 1
 	fi
-	if "$cc" --version | grep -q '(GCC)'; then
+	if ! "$cc" --version | grep -q -i 'clang'; then
 		configure_args+=("CC=$cc -static-libgcc")
 	fi
 	configure_args+=("${EXTRA_CONFIGURE_ARGS[@]}")