diff --git a/src/mock.cpp b/src/mock.cpp
index 33d208d..e274ed3 100644
--- a/src/mock.cpp
+++ b/src/mock.cpp
@@ -9,6 +9,14 @@
 
 #include <math.h>
 
+#ifndef STA_MS56XX_TEMPERATURE_SPATZ_ID
+#   error "MS56xx temperature SPATZ ID not defined."
+#endif // !STA_MS56XX_TEMPERATURE_SPATZ_ID
+
+#ifndef STA_MS56XX_PRESSURE_SPATZ_ID
+#   error "MS56xx pressure SPATZ ID not defined."
+#endif // !STA_MS56XX_PRESSURE_SPATZ_ID
+
 
 namespace sta
 {