diff --git a/configure b/configure
index 88cfd74b6..de87d9a6a 100755
--- a/configure
+++ b/configure
@@ -23194,7 +23194,7 @@ echo "$as_me: WARNING: Unable to locate gssapi.h, you will have to edit the Make
 	fi
     fi
 
-    SUDO_LIBS="${SUDO_LIBS}${LDAP_LIBS}"
+    SUDO_LIBS="${SUDO_LIBS} ${LDAP_LIBS}"
     LIBS="$_LIBS"
     LDFLAGS="$_LDFLAGS"
 fi
diff --git a/configure.in b/configure.in
index fdd61bcd5..7b9169e45 100644
--- a/configure.in
+++ b/configure.in
@@ -2394,7 +2394,7 @@ if test ${with_ldap-'no'} != "no"; then
 	fi
     fi
 
-    SUDO_LIBS="${SUDO_LIBS}${LDAP_LIBS}"
+    SUDO_LIBS="${SUDO_LIBS} ${LDAP_LIBS}"
     LIBS="$_LIBS"
     LDFLAGS="$_LDFLAGS"
 fi