diff --git a/src/m_random.c b/src/m_random.c
index 5fde12535..129a3b288 100644
--- a/src/m_random.c
+++ b/src/m_random.c
@@ -151,7 +151,7 @@ INT32 P_RandomKeyD(const char *rfile, INT32 rline, INT32 a)
 {
 	CONS_Printf("P_RandomKey() at: %sp %d\n", rfile, rline);
 #endif
-	return (INT32)((__internal_prng__() * a) >> FRACBITS);
+	return (INT32)(((INT64)__internal_prng__() * a) >> FRACBITS);
 }
 
 /** Provides a random integer in a given range.
@@ -171,7 +171,7 @@ INT32 P_RandomRangeD(const char *rfile, INT32 rline, INT32 a, INT32 b)
 {
 	CONS_Printf("P_RandomRange() at: %sp %d\n", rfile, rline);
 #endif
-	return (INT32)((__internal_prng__() * (b-a+1)) >> FRACBITS) + a;
+	return (INT32)(((INT64)__internal_prng__() * (b-a+1)) >> FRACBITS) + a;
 }