diff --git a/src/mraa.c b/src/mraa.c
index 739f371..d49be29 100644
--- a/src/mraa.c
+++ b/src/mraa.c
@@ -98,10 +98,10 @@ mraa_init()
     advance_func = (mraa_adv_func_t*) malloc(sizeof(mraa_adv_func_t));
     memset(advance_func, 0, sizeof(mraa_adv_func_t));
 
-#ifdef X86PLAT
+#if defined(X86PLAT)
     // Use runtime x86 platform detection
     platform_type = mraa_x86_platform();
-#elif ARMPLAT
+#elif defined(ARMPLAT)
     // Use runtime ARM platform detection
     platform_type = mraa_arm_platform();
 #else