diff --git a/Makefile b/Makefile
index 010a61b..3419e3f 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ else
   CXX     := c++
   LDFLAGS := -lm -shared
 endif
-CFLAGS := -g -Wall -Wno-unused-function -fPIC -DSM64_LIB_EXPORT -DGBI_FLOATS -DVERSION_US -DNO_SEGMENTED_MEMORY
+CFLAGS := -g -Wall -Wno-unused-function -fPIC -fvisibility=hidden -DSM64_LIB_EXPORT -DGBI_FLOATS -DVERSION_US -DNO_SEGMENTED_MEMORY
 
 SRC_DIRS  := src src/decomp src/decomp/engine src/decomp/include/PR src/decomp/game src/decomp/pc src/decomp/pc/audio src/decomp/mario src/decomp/tools src/decomp/audio
 BUILD_DIR := build
diff --git a/src/libsm64.h b/src/libsm64.h
index 31f231f..c678587 100644
--- a/src/libsm64.h
+++ b/src/libsm64.h
@@ -5,12 +5,14 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#ifdef _WIN32
+#if defined(_WIN32)
     #ifdef SM64_LIB_EXPORT
         #define SM64_LIB_FN __declspec(dllexport)
     #else
         #define SM64_LIB_FN __declspec(dllimport)
     #endif
+#elif defined(__GNUC__) && __GNUC__ >= 4
+    #define SM64_LIB_FN __attribute__ ((visibility("default")))
 #else
     #define SM64_LIB_FN
 #endif