diff --git a/configure.ac b/configure.ac
index 967b728b9432..16ce33eb319b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5063,7 +5063,7 @@ find_al()
 
     unset altest
 
-    for x in `ls /proc/registry/HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Microsoft\ SDKs/Windows`; do
+    for x in `ls /proc/registry32/HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Microsoft\ SDKs/Windows`; do
         reg_get_value_32 "HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Microsoft SDKs/Windows/$x/WinSDK-NetFx40Tools/InstallationFolder"
         if test -n "$regvalue" -a \( -f "$regvalue/al.exe" -o -f "$regvalue/bin/al.exe" \); then
             altest=$regvalue