diff --git a/chapter-3/3.4-generating-output/output.c b/chapter-3/3.4-generating-output/output.c
index 993775b..aa1e9c4 100644
--- a/chapter-3/3.4-generating-output/output.c
+++ b/chapter-3/3.4-generating-output/output.c
@@ -1,3 +1,5 @@
+#include <time.h>
+
 #include "../3.3-building-the-data-structure-in-c/structs.c"
 
 void generate(int nwords)
@@ -49,6 +51,10 @@ int main(void)
     for (int i = 0; i < NPREF; i++)
         prefix[i] = NONWORD;
 
+    long seed = time(NULL);
+
+    srand(seed);
+
     FILE *f = fopen("text.txt", "r");
     if (f == NULL)
         return 1;
@@ -58,4 +64,4 @@ int main(void)
     // printt();
     generate(MAXGEN);
     return 0;
-}
\ No newline at end of file
+}