diff --git a/src/mzscheme/src/schpriv.h b/src/mzscheme/src/schpriv.h
index f095c94305..809079cc14 100644
--- a/src/mzscheme/src/schpriv.h
+++ b/src/mzscheme/src/schpriv.h
@@ -121,7 +121,7 @@ void scheme_clear_ephemerons(void);
 #define BITS_PER_MZSHORT (8 * sizeof(mzshort))
 
 #ifndef NO_INLINE_KEYWORD
-# define MZ_INLINE MSC_IZE(MSC_IZE(inline))
+# define MZ_INLINE MSC_IZE(inline)
 #else
 # define MZ_INLINE /* empty */
 #endif