diff --git a/src/zr/infect.inc b/src/zr/infect.inc
index b85644b..9f7f415 100644
--- a/src/zr/infect.inc
+++ b/src/zr/infect.inc
@@ -203,7 +203,7 @@ InfectOnClientDisconnect(client)
     }
     
     // Get a random valid array index.
-    new randindex = GetRandomInt(0, eligibleclients - 1);
+    new randindex = Math_GetRandomInt(0, eligibleclients - 1);
     
     // Get the client stored in the random array index.
     new randclient = GetArrayCell(arrayEligibleClients, randindex);
diff --git a/src/zr/zombiereloaded.inc b/src/zr/zombiereloaded.inc
index 4c16e0b..854a543 100644
--- a/src/zr/zombiereloaded.inc
+++ b/src/zr/zombiereloaded.inc
@@ -412,3 +412,27 @@ ZRBoolToString(bool:value, String:output[], maxlen)
         strcopy(output, maxlen, "0");
     }
 }
+
+/**
+ * (from SMLIB 0.10.2)
+ * 
+ * Returns a random, uniform Integer number in the specified (inclusive) range.
+ * This is safe to use multiple times in a function.
+ * The seed is set automatically for each plugin.
+ * Rewritten by MatthiasVance, thanks.
+ * 
+ * @param min			Min value used as lower border
+ * @param max			Max value used as upper border
+ * @return				Random Integer number between min and max
+ */
+#define SIZE_OF_INT		2147483647		// without 0
+stock Math_GetRandomInt(min, max)
+{
+	new random = GetURandomInt();
+	
+	if (random == 0) {
+		random++;
+	}
+
+	return RoundToCeil(float(random) / (float(SIZE_OF_INT) / float(max - min + 1))) + min - 1;
+}