diff --git a/Software/src/common.cpp b/Software/src/common.cpp
index e201b28..d24198b 100644
--- a/Software/src/common.cpp
+++ b/Software/src/common.cpp
@@ -1,5 +1,12 @@
 #include "common.h"
 
+#define ARR_LEN(a) (sizeof(a)/sizeof((a)[0]))
+
+static_assert(ARR_LEN(SystemStatusString)  == SYSSTAT_COUNT,      "SystemStatusString size mismatch");
+static_assert(ARR_LEN(SpeedSourceString)   == SPEEDSOURCE_COUNT,   "SpeedSourceString size mismatch");
+static_assert(ARR_LEN(GPSBaudRateString)   == GPSBAUDRATE_COUNT,   "GPSBaudRateString size mismatch");
+static_assert(ARR_LEN(CANSourceString)     == CANSOURCE_COUNT,     "CANSourceString size mismatch");
+
 static const char kUnknownStr[] = "Unknown";
 
 // ---- System status string table ----