diff --git a/library/ecp.c b/library/ecp.c
index adef09e..796452b 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -68,13 +68,10 @@
 #define strcasecmp _stricmp
 #endif
 
-#if defined(_MSC_VER) && !defined(inline)
-#define inline _inline
-#else
-#if defined(__ARMCC_VERSION) && !defined(inline)
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
+    !defined(inline) && !defined(__cplusplus)
 #define inline __inline
-#endif /* __ARMCC_VERSION */
-#endif /*_MSC_VER */
+#endif
 
 /* Implementation that should never be optimized out by the compiler */
 static void polarssl_zeroize( void *v, size_t n ) {