diff --git a/package/popt/popt.mk b/package/popt/popt.mk
index 180972a293..9f2d070d89 100644
--- a/package/popt/popt.mk
+++ b/package/popt/popt.mk
@@ -13,6 +13,13 @@ POPT_LICENSE_FILES = COPYING
 
 POPT_CONF_ENV = ac_cv_va_copy=yes
 
+# The external Blackfin toolchains have <glob.h>, but not all the
+# necessary uClibc options for glob functions, so we force disable the
+# usage of the glob functions for these toolchains.
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2013R1),y)
+POPT_CONF_ENV += ac_cv_header_glob_h=no
+endif
+
 ifeq ($(BR2_PACKAGE_LIBICONV),y)
 POPT_CONF_ENV += am_cv_lib_iconv=yes
 POPT_CONF_OPT += --with-libiconv-prefix=$(STAGING_DIR)/usr