diff --git a/src/mraa.c b/src/mraa.c
index 2545699..527fd89 100644
--- a/src/mraa.c
+++ b/src/mraa.c
@@ -185,7 +185,7 @@ mraa_setup_i2c(int bus)
     if (plat == NULL)
         return -3;
 
-    if (plat->i2c_bus_count >! 0) {
+    if (plat->i2c_bus_count == 0) {
         fprintf(stderr, "No i2c buses defined in platform");
         return -1;
     }
@@ -194,6 +194,11 @@ mraa_setup_i2c(int bus)
         return -1;
     }
 
+    if (plat->i2c_bus[bus].bus_id == -1) {
+        fprintf(stderr, "Platform not currently allowed for mraa use\n");
+        return -1;
+    }
+
     int pos = plat->i2c_bus[bus].sda;
     if (plat->pins[pos].i2c.mux_total > 0)
         if (mraa_setup_mux_mapped(plat->pins[pos].i2c) != MRAA_SUCCESS)