diff --git a/esphome/components/mcp23x17_base/mcp23x17_base.cpp b/esphome/components/mcp23x17_base/mcp23x17_base.cpp
index e975670faa..744f2fbe9c 100644
--- a/esphome/components/mcp23x17_base/mcp23x17_base.cpp
+++ b/esphome/components/mcp23x17_base/mcp23x17_base.cpp
@@ -24,6 +24,7 @@ void MCP23X17Base::pin_mode(uint8_t pin, gpio::Flags flags) {
   uint8_t gppu = pin < 8 ? mcp23x17_base::MCP23X17_GPPUA : mcp23x17_base::MCP23X17_GPPUB;
   if (flags == gpio::FLAG_INPUT) {
     this->update_reg(pin, true, iodir);
+    this->update_reg(pin, false, gppu);
   } else if (flags == (gpio::FLAG_INPUT | gpio::FLAG_PULLUP)) {
     this->update_reg(pin, true, iodir);
     this->update_reg(pin, true, gppu);