diff --git a/esphome/components/modem/__init__.py b/esphome/components/modem/__init__.py
index 7d87c213e7..ca2778da8b 100644
--- a/esphome/components/modem/__init__.py
+++ b/esphome/components/modem/__init__.py
@@ -79,6 +79,7 @@ async def to_code(config):
     add_idf_sdkconfig_option("CONFIG_PPP_CHAP_SUPPORT", True)
     add_idf_sdkconfig_option("CONFIG_LWIP_PPP_VJ_HEADER_COMPRESSION", True)
     add_idf_sdkconfig_option("CONFIG_LWIP_PPP_NOTIFY_PHASE_SUPPORT", True)
+    add_idf_sdkconfig_option("CONFIG_UART_ISR_IN_IRAM", True)
 
     cg.add_define("USE_MODEM")