diff --git a/components/i2c/include/i2c_format_helpers.hpp b/components/i2c/include/i2c_format_helpers.hpp
index 949a18bf2..a719427b0 100644
--- a/components/i2c/include/i2c_format_helpers.hpp
+++ b/components/i2c/include/i2c_format_helpers.hpp
@@ -18,8 +18,10 @@ template <> struct fmt::formatter<i2c_port_t> {
     switch (p) {
     case I2C_NUM_0:
       return fmt::format_to(ctx.out(), "I2C_NUM_0");
-    case I2C_NUM_1:
-      return fmt::format_to(ctx.out(), "I2C_NUM_1");
+    #ifdef I2C_NUM_1
+      case I2C_NUM_1:
+        return fmt::format_to(ctx.out(), "I2C_NUM_1");
+    #endif
     default:
       return fmt::format_to(ctx.out(), "Unknown");
     }