diff --git a/core/c/jbigi/mbuild-all.sh b/core/c/jbigi/mbuild-all.sh
index 9cbe488a5452d13c4eb8b2133debc8bc581502ee..c257278caf3e9776a6a1358cc1a17412e16478c0 100755
--- a/core/c/jbigi/mbuild-all.sh
+++ b/core/c/jbigi/mbuild-all.sh
@@ -76,7 +76,7 @@ if [ "$VER" = "" ] ; then
 fi
 
 
-case `uname -sr` in
+case `uname -s` in
 MINGW*)
         PLATFORM_LIST="${MINGW_PLATFORMS}"
         NAME="jbigi"
diff --git a/core/c/jbigi/mbuild_jbigi.sh b/core/c/jbigi/mbuild_jbigi.sh
index fbdd37ebbbe6b6c245a882128baa08062bd5309b..545128aebcde44001b4a00b333f37d3ca16f23ae 100755
--- a/core/c/jbigi/mbuild_jbigi.sh
+++ b/core/c/jbigi/mbuild_jbigi.sh
@@ -4,7 +4,7 @@
 # When executed in OSX: Produces a libjbigi.jnilib
 CC="gcc"
 
-case `uname -sr` in
+case `uname -s` in
 MINGW*)
         JAVA_HOME="c:/software/j2sdk1.4.2_05"
         COMPILEFLAGS="-Wall"