diff --git a/Modules/resource.c b/Modules/resource.c
index 01fe79c38d6..9ff9b63b5e0 100644
--- a/Modules/resource.c
+++ b/Modules/resource.c
@@ -11,8 +11,12 @@ int getrusage(int who, struct rusage *rusage);
 #endif
 
 #ifndef getpagesize
+#ifdef linux
+extern size_t getpagesize(void);
+#else
 int getpagesize(void);
 #endif
+#endif
 
 #define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)