diff --git a/pkgs/servers/sip/freeswitch/default.nix b/pkgs/servers/sip/freeswitch/default.nix
index c6c594ecaec8..66c294f5d4a8 100644
--- a/pkgs/servers/sip/freeswitch/default.nix
+++ b/pkgs/servers/sip/freeswitch/default.nix
@@ -125,6 +125,10 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-Wno-error";
 
+  # Using c++14 because of build error
+  # gsm_at.h:94:32: error: ISO C++17 does not allow dynamic exception specifications
+  CXXFLAGS = "-std=c++14";
+
   CFLAGS = "-D_ANSI_SOURCE";
 
   hardeningDisable = [ "format" ];