diff --git a/repos/libports/ports/jitterentropy.hash b/repos/libports/ports/jitterentropy.hash
index a92744f43..4ad8020d1 100644
--- a/repos/libports/ports/jitterentropy.hash
+++ b/repos/libports/ports/jitterentropy.hash
@@ -1 +1 @@
-7dbc3c0143b0312290895d91ccfa97e6a6e2ae3f
+0105c3c8c4b39c25aa0ecb7cd1ba6894571f37f0
diff --git a/repos/libports/ports/jitterentropy.port b/repos/libports/ports/jitterentropy.port
index 19480903c..a9b3af67f 100644
--- a/repos/libports/ports/jitterentropy.port
+++ b/repos/libports/ports/jitterentropy.port
@@ -1,9 +1,11 @@
 LICENSE   := BSD
-VERSION   := 20140411
+VERSION   := 1.2.0
 DOWNLOADS := jitterentropy.archive
 
-URL(jitterentropy) := http://www.chronox.de/jent/jitterentropy-$(VERSION).tar.bz2
-SHA(jitterentropy) := a072ed4788b9de49bef5d339d61eaa8e88547cb3
+URL(jitterentropy) := http://www.chronox.de/jent/jitterentropy-$(VERSION).tar.xz
+SHA(jitterentropy) := b1f8033e515137bb9edcc261aa88f3802489db05
+SIG(jitterentropy) := ${URL(jitterentropy)}.asc
+KEY(jitterentropy) := 5F0D446594D2BF6977A9828AF02C639D843B5F11
 DIR(jitterentropy) := src/lib/jitterentropy
 
 DIRS := include/jitterentropy
diff --git a/repos/libports/src/lib/jitterentropy/jitterentropy-base-genode.h b/repos/libports/src/lib/jitterentropy/jitterentropy-base-genode.h
index 449541440..2abc7d90b 100644
--- a/repos/libports/src/lib/jitterentropy/jitterentropy-base-genode.h
+++ b/repos/libports/src/lib/jitterentropy/jitterentropy-base-genode.h
@@ -17,11 +17,13 @@
 /* needed type definitions */
 #include <base/fixed_stdint.h>
 
-typedef __SIZE_TYPE__   size_t;
+typedef __SIZE_TYPE__     size_t;
+typedef signed long      ssize_t;
 typedef genode_uint32_t uint32_t;
 typedef genode_uint64_t uint64_t;
 typedef uint32_t        __u32;
 typedef uint64_t        __u64;
+typedef genode_int64_t  __s64;
 
 #ifndef __cplusplus
 #define NULL (void*)0