diff --git a/src/gunzip.c b/src/gunzip.c
index fc1bef6..0284bdd 100644
--- a/src/gunzip.c
+++ b/src/gunzip.c
@@ -57,7 +57,7 @@ int main(int argc, char **argv)
 
 	UART0_setbaud(460800);
 
-	printf("Reading gzipped stream..\n");
+	fprintf(stdout, "Reading gzipped stream..\n");
 
 	pPtr_r = buffer;
 	pPtr_w = buffer;
@@ -72,7 +72,7 @@ int main(int argc, char **argv)
 		sleep(1);
 	}
 
-	printf("file_len: %d\n", file_len);
+	fprintf(stdout, "file_len: %d\n", file_len);
    bytes = file_len;
    fileData = pPtr_r;
 
@@ -85,26 +85,26 @@ int main(int argc, char **argv)
    if (tmp[0] == -1)
      {
 	// error reading from file
-	printf("error reading data from file\n");
+	fprintf(stdout, "error reading data from file\n");
 	return 0;
      }
    tmp[1] = READBYTE(&zs);
 
    if (tmp[0] != 0x1f || tmp[1] != 0x8b) {
-//      fprintf(stderr, "Magic number mismatch 0x%02x%02x\n",
-//	      tmp[0], tmp[1]);
+      fprintf(stdout, "Magic number mismatch 0x%02x%02x\n",
+	      tmp[0], tmp[1]);
       return 20;
    }
 
    tmp[0] = READBYTE(&zs);
    if(tmp[0] != 8) {
-//      fprintf(stderr, "Unknown compression method: 0x%02x\n", tmp[0]);
+      fprintf(stdout, "Unknown compression method: 0x%02x\n", tmp[0]);
       return 20;
    }
 
    gpflags = READBYTE(&zs);
    if ((gpflags & ~0x1f)) {
-      printf("Unknown flags set!\n");
+      fprintf(stdout, "Unknown flags set!\n");
    }
 
    /* Skip file modification time (4 bytes) */
@@ -140,12 +140,12 @@ int main(int argc, char **argv)
       READBYTE(&zs);
    }
 
-	printf("Go\n");
+	fprintf(stdout, "Go\n");
 	// normal test
 	start_time = clock();
 	if (InflateData(&zs))
 	{
-		printf("Problem during decompression!\n");
+		fprintf(stdout, "Problem during decompression!\n");
 		return 0;
 	}
 	work_time = clock() - start_time;