diff --git a/tools/str/Makefile b/tools/str/Makefile
index 78b0cbfc3..169d1f0c7 100644
--- a/tools/str/Makefile
+++ b/tools/str/Makefile
@@ -1,5 +1,5 @@
 unstr: unstr.c unstr.h
-	gcc -W -Wall -g -O0 unstr.c -o unstr -lpng -lz -lm
+	gcc -W -Wall -g -O0 unstr.c -o unstr
 
 clean:
 	rm unstr unstr.tgz
diff --git a/tools/str/unstr.c b/tools/str/unstr.c
index e694f3844..7824f2bc4 100644
--- a/tools/str/unstr.c
+++ b/tools/str/unstr.c
@@ -19,8 +19,6 @@
 
 #include "unstr.h"
 
-#include <png.h>
-
 
 struct options {
 	char *infile;