diff --git a/libavformat/avisynth.c b/libavformat/avisynth.c
index f94f7b786d..c66f65d838 100644
--- a/libavformat/avisynth.c
+++ b/libavformat/avisynth.c
@@ -52,7 +52,7 @@
       #define AVISYNTH_LIB "libavxsynth.so"
     #endif
 
-  #define LoadLibrary(x) dlopen(x, RTLD_NOW | RTLD_GLOBAL)
+  #define LoadLibrary(x) dlopen(x, RTLD_NOW | RTLD_LOCAL)
   #define GetProcAddress dlsym
   #define FreeLibrary dlclose
 #endif