diff --git a/truffle/mx.truffle/mx_truffle.py b/truffle/mx.truffle/mx_truffle.py
index 76be0892699a..520038c16e0a 100644
--- a/truffle/mx.truffle/mx_truffle.py
+++ b/truffle/mx.truffle/mx_truffle.py
@@ -1566,7 +1566,7 @@ def getArchivableResults(self, use_relpath=True, single=False):
             configure_args = ['--disable-dependency-tracking',
                               '--disable-shared',
                               '--with-pic',
-                              ' CFLAGS="{}"'.format(' '.join(['-g', '-O3'] + (['-m64'] if mx.get_os() == 'solaris' else []))),
+                              ' CFLAGS="{}"'.format(' '.join(['-g', '-O3', '-fvisibility=hidden'] + (['-m64'] if mx.get_os() == 'solaris' else []))),
                               'CPPFLAGS="-DNO_JAVA_RAW_API"',
                              ]
 
diff --git a/truffle/mx.truffle/suite.py b/truffle/mx.truffle/suite.py
index 41d082b4311d..7df413e13b4d 100644
--- a/truffle/mx.truffle/suite.py
+++ b/truffle/mx.truffle/suite.py
@@ -963,19 +963,19 @@
         },
         "linux" : {
           "<others>" : {
-            "cflags" : ["-g", "-Wall", "-Werror", "-D_GNU_SOURCE"],
+            "cflags" : ["-g", "-Wall", "-Werror", "-D_GNU_SOURCE", "-fvisibility=hidden"],
             "ldlibs" : ["-ldl"],
           },
         },
         "linux-musl" : {
           "<others>" : {
-            "cflags" : ["-g", "-Wall", "-Werror"],
+            "cflags" : ["-g", "-Wall", "-Werror", "-fvisibility=hidden"],
             "ldlibs" : ["-ldl"],
           },
         },
         "<others>" : {
           "<others>" : {
-            "cflags" : ["-g", "-Wall", "-Werror"],
+            "cflags" : ["-g", "-Wall", "-Werror", "-fvisibility=hidden"],
             "ldlibs" : ["-ldl"],
           },
         },