diff --git a/src/config.h b/src/config.h
index b90b7e6..c33d207 100644
--- a/src/config.h
+++ b/src/config.h
@@ -36,6 +36,8 @@
 #ifndef GFLAGS_DLL_DECL
 #  if GFLAGS_IS_A_DLL && defined(_MSC_VER)
 #    define GFLAGS_DLL_DECL __declspec(dllexport)
+#  elif defined(__GNUC__) && __GNUC__ >= 4
+#    define GFLAGS_DLL_DECL __attribute__((visibility("default")))
 #  else
 #    define GFLAGS_DLL_DECL
 #  endif
diff --git a/src/gflags_declare.h.in b/src/gflags_declare.h.in
index 752a34d..ab7bd24 100644
--- a/src/gflags_declare.h.in
+++ b/src/gflags_declare.h.in
@@ -58,6 +58,8 @@
 #ifndef GFLAGS_DLL_DECL
 #  if GFLAGS_IS_A_DLL && defined(_MSC_VER)
 #    define GFLAGS_DLL_DECL __declspec(dllimport)
+#  elif defined(__GNUC__) && __GNUC__ >= 4
+#    define GFLAGS_DLL_DECL __attribute__((visibility("default")))
 #  else
 #    define GFLAGS_DLL_DECL
 #  endif
@@ -67,6 +69,8 @@
 #ifndef GFLAGS_DLL_DECLARE_FLAG
 #  if GFLAGS_IS_A_DLL && defined(_MSC_VER)
 #    define GFLAGS_DLL_DECLARE_FLAG __declspec(dllimport)
+#  elif defined(__GNUC__) && __GNUC__ >= 4
+#    define GFLAGS_DLL_DECLARE_FLAG __attribute__((visibility("default")))
 #  else
 #    define GFLAGS_DLL_DECLARE_FLAG
 #  endif