diff --git a/CHANGES b/CHANGES
index 5efe7b10be..a6f190bf55 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,10 @@
                                                      -*- coding: utf-8 -*-
 Changes for APR 2.0.0
 
+  *) apr_ldap: Explicitly detect the case where OpenLDAP has been
+     installed with SASL support, but the SASL headers are missing.
+     [Graham Leggett]
+
   *) testmmap: Avoid a crash after test_file_open() fails. [Graham
      Leggett]
 
diff --git a/build/ldap.m4 b/build/ldap.m4
index 600d7f1c9f..5345c042b8 100644
--- a/build/ldap.m4
+++ b/build/ldap.m4
@@ -93,6 +93,7 @@ AC_DEFUN([APU_FIND_LDAPLIB], [
     AC_CHECK_LIB(${ldaplib}, ldap_init, 
       [
         LDADD_ldap_found="-l${ldaplib} ${extralib}"
+        AC_CHECK_LIB(${ldaplib}, ldap_sasl_interactive_bind, apu_have_ldap_sasl_interactive_bind="1", , ${extralib})
         apu_have_ldap="1";
       ], , ${extralib})
   fi
@@ -106,6 +107,7 @@ AC_DEFUN([APU_FIND_LDAP],  [
 
 echo $ac_n "${nl}checking for ldap support..."
 
+apu_have_ldap_sasl_interactive_bind="0"
 apu_have_ldap="0";
 apu_have_ldap_openldap="0"
 apu_have_ldap_microsoft="0"
@@ -224,6 +226,7 @@ AC_CHECK_HEADERS([sasl.h sasl/sasl.h])
 
 AC_SUBST(ldap_h)
 AC_SUBST(lber_h)
+AC_SUBST(apu_have_ldap_sasl_interactive_bind)
 AC_SUBST(apu_have_ldap)
 AC_SUBST(apu_have_ldap_openldap)
 AC_SUBST(apu_have_ldap_solaris)
diff --git a/configure.in b/configure.in
index 34aeebf034..8c2a0cbdf0 100644
--- a/configure.in
+++ b/configure.in
@@ -3306,7 +3306,8 @@ if test -d $srcdir/test; then
    AC_CONFIG_FILES([test/Makefile test/internal/Makefile])
 fi
 
-AC_CONFIG_FILES([include/private/apu_select_dbm.h
+AC_CONFIG_FILES([include/private/apu_ldap_internal.h
+                 include/private/apu_select_dbm.h
                  include/apu_want.h])
 
 dir=include/arch/unix
diff --git a/include/private/apu_ldap_internal.h.in b/include/private/apu_ldap_internal.h.in
new file mode 100644
index 0000000000..1b65dd8476
--- /dev/null
+++ b/include/private/apu_ldap_internal.h.in
@@ -0,0 +1,25 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef APU_LDAP_INTERNAL_H
+#define APU_LDAP_INTERNAL_H
+
+/*
+** The following macros control what features APRUTIL will use
+*/
+#define APR_HAVE_LDAP_SASL_INTERACTIVE_BIND @apu_have_ldap_sasl_interactive_bind@
+
+#endif	/* !APU_LDAP_INTERNAL_H */
diff --git a/include/private/apu_ldap_internal.hw b/include/private/apu_ldap_internal.hw
new file mode 100644
index 0000000000..5aebf0dff0
--- /dev/null
+++ b/include/private/apu_ldap_internal.hw
@@ -0,0 +1,25 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef APU_LDAP_INTERNAL_H
+#define APU_LDAP_INTERNAL_H
+
+/*
+** The following macros control what features APRUTIL will use
+*/
+#define APR_HAVE_LDAP_SASL_INTERACTIVE_BIND 0
+
+#endif	/* !APU_LDAP_INTERNAL_H */
diff --git a/ldap/apr_ldap.c b/ldap/apr_ldap.c
index 23c9ec3a75..31b23654c9 100644
--- a/ldap/apr_ldap.c
+++ b/ldap/apr_ldap.c
@@ -25,6 +25,7 @@
 #include "apr_ldap.h"
 #include "apr_ldap_internal.h"
 #include "apu_internal.h"
+#include "apu_ldap_internal.h"
 #include "apr_errno.h"
 #include "apr_poll.h"
 #include "apr_pools.h"
@@ -1803,7 +1804,11 @@ APU_DECLARE_LDAP(apr_status_t) apr_ldap_poll(apr_pool_t *pool,
 
 
 
-#if APR_HAS_OPENLDAP_LDAPSDK
+#if APR_HAS_OPENLDAP_LDAPSDK && APR_HAVE_LDAP_SASL_INTERACTIVE_BIND
+
+#if !defined(HAVE_SASL_H) && !defined(HAVE_SASL_SASL_H)
+#error OpenLDAP was built with SASL support, but the SASL headers are not installed as required.
+#endif
 
 typedef struct apr_ldap_bind_ctx_t {
     apr_ldap_t *ld;
@@ -2000,7 +2005,7 @@ APU_DECLARE_LDAP(apr_status_t) apr_ldap_bind(apr_pool_t *pool, apr_ldap_t *ldap,
     }
     else {
 
-#if APR_HAS_OPENLDAP_LDAPSDK
+#if APR_HAS_OPENLDAP_LDAPSDK && APR_HAVE_LDAP_SASL_INTERACTIVE_BIND
 
         const char *rmech;
 
diff --git a/libapr.dsp b/libapr.dsp
index 3c4e53b54c..1a96b1feb8 100644
--- a/libapr.dsp
+++ b/libapr.dsp
@@ -1115,6 +1115,57 @@ SOURCE=.\include\apu.h
 # End Source File
 # Begin Source File
 
+SOURCE=.\include\private\apu_ldap_internal.h.in
+# End Source File
+# Begin Source File
+
+SOURCE=.\include\private\apu_ldap_internal.hw
+
+!IF  "$(CFG)" == "libapr - Win32 Release"
+
+# Begin Custom Build - Creating apu_ldap_internal.h from apu_ldap_internal.hw
+InputPath=.\include\private\apu_ldap_internal.hw
+
+".\include\private\apu_ldap_internal.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+        type .\include\private\apu_ldap_internal.hw > .\include\private\apu_ldap_internal.h
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "libapr - Win32 Debug"
+
+# Begin Custom Build - Creating apu_ldap_internal.h from apu_ldap_internal.hw
+InputPath=.\include\private\apu_ldap_internal.hw
+
+".\include\private\apu_ldap_internal.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+        type .\include\private\apu_ldap_internal.hw > .\include\private\apu_ldap_internal.h
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "libapr - x64 Release"
+
+# Begin Custom Build - Creating apu_ldap_internal.h from apu_ldap_internal.hw
+InputPath=.\include\private\apu_ldap_internal.hw
+
+".\include\private\apu_ldap_internal.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+        type .\include\private\apu_ldap_internal.hw > .\include\private\apu_ldap_internal.h
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "libapr - x64 Debug"
+
+# Begin Custom Build - Creating apu_ldap_internal.h from apu_ldap_internal.hw
+InputPath=.\include\private\apu_ldap_internal.hw
+
+".\include\private\apu_ldap_internal.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+        type .\include\private\apu_ldap_internal.hw > .\include\private\apu_ldap_internal.h
+
+# End Custom Build
+
+!ENDIF
+
+# End Source File
+# Begin Source File
+
 SOURCE=.\include\private\apu_select_dbm.h.in
 # End Source File
 # Begin Source File