diff --git a/vm/os-linux.cpp b/vm/os-linux.cpp
index f5814d7f18..2bc121ffc7 100644
--- a/vm/os-linux.cpp
+++ b/vm/os-linux.cpp
@@ -23,36 +23,36 @@ const char *vm_executable_path()
 
 #ifdef SYS_inotify_init
 
-int inotify_init()
+VM_C_API int inotify_init()
 {
 	return syscall(SYS_inotify_init);
 }
 
-int inotify_add_watch(int fd, const char *name, u32 mask)
+VM_C_API int inotify_add_watch(int fd, const char *name, u32 mask)
 {
 	return syscall(SYS_inotify_add_watch, fd, name, mask);
 }
 
-int inotify_rm_watch(int fd, u32 wd)
+VM_C_API int inotify_rm_watch(int fd, u32 wd)
 {
 	return syscall(SYS_inotify_rm_watch, fd, wd);
 }
 
 #else
 
-int inotify_init()
+VM_C_API int inotify_init()
 {
 	not_implemented_error();
 	return -1;
 }
 
-int inotify_add_watch(int fd, const char *name, u32 mask)
+VM_C_API int inotify_add_watch(int fd, const char *name, u32 mask)
 {
 	not_implemented_error();
 	return -1;
 }
 
-int inotify_rm_watch(int fd, u32 wd)
+VM_C_API int inotify_rm_watch(int fd, u32 wd)
 {
 	not_implemented_error();
 	return -1;
diff --git a/vm/os-linux.hpp b/vm/os-linux.hpp
index 257a6b0692..de13896b9a 100644
--- a/vm/os-linux.hpp
+++ b/vm/os-linux.hpp
@@ -3,8 +3,8 @@
 namespace factor
 {
 
-int inotify_init();
-int inotify_add_watch(int fd, const char *name, u32 mask);
-int inotify_rm_watch(int fd, u32 wd);
+VM_C_API int inotify_init();
+VM_C_API int inotify_add_watch(int fd, const char *name, u32 mask);
+VM_C_API int inotify_rm_watch(int fd, u32 wd);
 
 }