diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index 15233609890..345e6da7998 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,10 @@
+2010-11-09  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* testsuite/libjava.jvmti/jvmti.exp (gcj_jvmti_compile_cxx_to_o):
+	Add -pthread on alpha*-dec-osf*.
+	* testsuite/libjava.jvmti/jvmti-interp.exp
+	(gcj_jni_compile_c_to_so): Likewise.
+
 2010-10-12  Andrew John Hughes  <ahughes@redhat.com>
 
 	Import GNU Classpath (libgcj-snapshot-20100921).
diff --git a/libjava/testsuite/libjava.jvmti/jvmti-interp.exp b/libjava/testsuite/libjava.jvmti/jvmti-interp.exp
index 62c82e92afc..fd660f35164 100644
--- a/libjava/testsuite/libjava.jvmti/jvmti-interp.exp
+++ b/libjava/testsuite/libjava.jvmti/jvmti-interp.exp
@@ -37,6 +37,10 @@ proc gcj_jni_compile_c_to_so {file {options {}}} {
   if { [istarget "arm*"] } {
       lappend options "additional_flags=-Wno-abi"
   }
+  # Tru64 UNIX requires <pthread.h> to be compiled with -pthread.
+  if { [istarget "alpha*-dec-osf*"] } {
+      lappend options "additional_flags=-pthread"
+  }
 
   set filename [file tail $file]
   set name [file rootname $filename]
diff --git a/libjava/testsuite/libjava.jvmti/jvmti.exp b/libjava/testsuite/libjava.jvmti/jvmti.exp
index 571952e807c..2d939852e5e 100644
--- a/libjava/testsuite/libjava.jvmti/jvmti.exp
+++ b/libjava/testsuite/libjava.jvmti/jvmti.exp
@@ -20,6 +20,10 @@ proc gcj_jvmti_compile_cxx_to_o {file {options {}}} {
   if { [istarget "arm*"] } {
       lappend options "additional_flags=-Wno-abi"
   }
+  # Tru64 UNIX requires <pthread.h> to be compiled with -pthread.
+  if { [istarget "alpha*-dec-osf*"] } {
+      lappend options "additional_flags=-pthread"
+  }
 
   set x [libjava_prune_warnings \
 	   [target_compile $file $oname object $options]]