diff --git a/package/znc/znc.mk b/package/znc/znc.mk
index 78e1410b68..54dc63f4ea 100644
--- a/package/znc/znc.mk
+++ b/package/znc/znc.mk
@@ -11,6 +11,11 @@ ZNC_LICENSE_FILES = LICENSE
 ZNC_DEPENDENCIES = host-pkgconf
 ZNC_CONF_OPTS = -DWANT_CYRUS=OFF -DWANT_I18N=OFF -DWANT_PERL=OFF
 
+# Before CMake 3.10, passing THREADS_PTHREAD_ARG=OFF was needed to
+# disable a try_run() call in the FindThreads tests, which caused a
+# build failure when cross-compiling.
+ZNC_CONF_OPTS += -DTHREADS_PTHREAD_ARG=OFF
+
 ifeq ($(BR2_PACKAGE_ICU),y)
 ZNC_DEPENDENCIES += icu
 ZNC_CONF_OPTS += -DWANT_ICU=ON