diff --git a/scripts/crosstool-NG.sh.in b/scripts/crosstool-NG.sh.in
index 379f1701..cc54202b 100644
--- a/scripts/crosstool-NG.sh.in
+++ b/scripts/crosstool-NG.sh.in
@@ -332,9 +332,9 @@ if [ -z "${CT_RESTART}" ]; then
     fi
 
     # Determine build system if not set by the user
-    case "${CT_BUILD}" in
-        "") CT_BUILD=$("${CT_BUILD_PREFIX}gcc${CT_BUILD_SUFFIX}" -dumpmachine);;
-    esac
+    if [ -z "${CT_BUILD}" ]; then
+        CT_BUILD=$(CT_DoConfigGuess)
+    fi
 
     # Prepare mangling patterns to later modify BUILD and HOST (see below)
     case "${CT_TOOLCHAIN_TYPE}" in