diff --git a/VERSION b/VERSION
index c6fad45..3b66ac4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.263
+1.5.264
diff --git a/scripts/configure b/scripts/configure
index 3e87a98..2dff14b 100755
--- a/scripts/configure
+++ b/scripts/configure
@@ -6302,7 +6302,7 @@ fi
 
     *darwin*)
       SHDLIB_EXT=".dylib"
-      LDDL_FLAGS="-dynamiclib -flat_namespace -undefined suppress -noprebind"
+      LDDL_FLAGS="-dynamiclib -undefined dynamic_lookup"
       LDFLAGS="${LDFLAGS} ${LIB_SPECS}"
       CFLAGS="${CFLAGS} ${X_CFLAGS} ${INC_SPECS} -I/sw/include -fno-common"
       ;;
diff --git a/scripts/configure.in b/scripts/configure.in
index 2fd099f..6da14cd 100644
--- a/scripts/configure.in
+++ b/scripts/configure.in
@@ -1033,7 +1033,7 @@ fi
 
     *darwin*)
       SHDLIB_EXT=".dylib"
-      LDDL_FLAGS="-dynamiclib -flat_namespace -undefined suppress -noprebind"
+      LDDL_FLAGS="-dynamiclib -undefined dynamic_lookup"
       LDFLAGS="${LDFLAGS} ${LIB_SPECS}"
       CFLAGS="${CFLAGS} ${X_CFLAGS} ${INC_SPECS} -I/sw/include -fno-common"
       ;;