diff --git a/package/asterisk/Makefile b/package/asterisk/Makefile
index f42d6f847..f428e9a3e 100644
--- a/package/asterisk/Makefile
+++ b/package/asterisk/Makefile
@@ -88,7 +88,7 @@ asterisk-compile: $(PKG_BUILD_DIR)/.patched
 		$(TARGET_CONFIGURE_OPTS) \
 		OPTIMIZE="$(TARGET_CFLAGS)" \
 		PROC="$(ARCH)" \
-		CFLAGS_EXTRA="-I$(STAGING_DIR)/usr/include" \
+		CFLAGS_EXTRA="-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include/speex" \
 		LDFLAGS_EXTRA="-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/usr/lib/mysql" \
 		CRYPTO_LIBS="-L$(STAGING_DIR)/usr/lib -Wl,-Bstatic -lssl -lcrypto -Wl,-Bdynamic" \
 		EXTRA_APPS="$(APPS)" \