diff --git a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/arbitrary_loads.c b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/arbitrary_loads.c
index da366b97..57b8c0b9 100644
--- a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/arbitrary_loads.c
+++ b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/arbitrary_loads.c
@@ -19,10 +19,12 @@ volatile long _NONSENSE_VAR = 0;
 #define CLAMP(X,LB,UB) CLAMP_CEILING(CLAMP_FLOOR(X,LB),UB) // branch-less clamping
 
 // Random numbers ===
-#define A (unsigned int)2000000011 // prime
-#define M (unsigned int)4000000007 // prime
-#define C (unsigned int)1283612343
-static unsigned int rng_seed = 2345745;
+// glibc
+// https://en.wikipedia.org/wiki/Linear_congruential_generator
+#define A 1103515245ull
+#define M 0x80000000ull
+#define C 12345ull
+static unsigned long long rng_seed = 2345745ull;
 #define RNG rng_seed+=((A*((rng_seed+=C)-C)+C) % M)
 #define RNG_FROM(X) ((A*X+C) % M)