diff --git a/zen-rapl.c b/zen-rapl.c
index e60faf5..d331ff8 100644
--- a/zen-rapl.c
+++ b/zen-rapl.c
@@ -267,11 +267,18 @@ int main(int argc, char *argv[]) {
 		sprintf(core_name, "Core_%d:", i);
 		printf("%-12s   %6.2f W\n", core_name, i, core_power[i]);
 	}
+
+	float avg_fid = 0.0;
 	
 	/* Print core effective frequencies */
 	for (i = 0; i < cores; i++) {
 		sprintf(core_name, "Core_%d_eff:", i);
 		printf("%-12s %6.3f GHz\n", core_name, i, core_fid[i]);
+		avg_fid += core_fid[i];
 	}
+
+	avg_fid /= cores;
+	printf("%-12s %6.3f GHz\n", "Average_eff:", i, avg_fid);
+	
     return 0;
 }