diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index 63b40fc017f1..371e5ba02577 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,8 @@
+2010-02-24  Andrew Haley  <aph@redhat.com>
+
+	PR java/40816
+	* include/jni_md.h: jboolean is an unsigned type.
+
 2010-02-02  Jack Howarth  <howarth@bromo.med.uc.edu>
 
 	PR java/41991
diff --git a/libjava/include/jni_md.h b/libjava/include/jni_md.h
index f806bac51798..f65a15c5659d 100644
--- a/libjava/include/jni_md.h
+++ b/libjava/include/jni_md.h
@@ -78,7 +78,7 @@ typedef int    jbyte  __attribute__((__mode__(__QI__)));
 typedef int    jshort __attribute__((__mode__(__HI__)));
 typedef int    jint   __attribute__((__mode__(__SI__)));
 typedef int    jlong  __attribute__((__mode__(__DI__)));
-typedef int    jboolean __attribute__((__mode__(__QI__)));
+typedef unsigned int   jboolean __attribute__((__mode__(__QI__)));
 typedef unsigned short jchar __attribute__((__mode__(__HI__)));
 typedef float  jfloat;
 typedef double jdouble;
@@ -99,7 +99,7 @@ typedef int64_t jlong;
 typedef float jfloat;
 typedef double jdouble;
 typedef jint jsize;
-typedef int8_t jboolean;
+typedef uint8_t jboolean;
 typedef uint16_t jchar;
 
 #  else /* JV_HAVE_INTTYPES_H */