--- a/src-IL/include/il_endian.h	2017-06-02 12:05:55.321355203 +0200
+++ b/src-IL/include/il_endian.h	2017-06-02 11:57:47.210954830 +0200
@@ -68,6 +68,8 @@ extern "C" {
 #define INLINE
 #endif
 
+#pragma GCC visibility push(hidden)
+
 void   iSwapUShort(ILushort *s);
 void   iSwapShort(ILshort *s);
 void   iSwapUInt(ILuint *i);
@@ -101,6 +103,8 @@ ILubyte SaveBigDouble(ILdouble d);
 
 void EndianSwapData(void *_Image);
 
+#pragma GCC visibility pop
+
 #ifdef __cplusplus
 }
 #endif