1 files changed, 7 insertions, 0 deletions
diff --git a/src/libmpeg2/mpeg2_internal.h b/src/libmpeg2/mpeg2_internal.h
index f279cd626..cb00a830b 100644
--- a/src/libmpeg2/mpeg2_internal.h
+++ b/src/libmpeg2/mpeg2_internal.h
@@ -243,10 +243,17 @@ void mpeg2_idct_mmx_init (void);
 void mpeg2_idct_copy_altivec (int16_t * block, uint8_t * dest, int stride);
 void mpeg2_idct_add_altivec (int16_t * block, uint8_t * dest, int stride);
 #else /* HOST_OS_DARWIN */
+# ifdef ENABLE_ALTIVEC
 void mpeg2_idct_copy_altivec (vector signed short * block, unsigned char * dest,
 			      int stride);
 void mpeg2_idct_add_altivec (vector signed short * block, unsigned char * dest,
 			     int stride);
+# else /* ! ENABLE_ALTIVEC */
+void mpeg2_idct_copy_altivec (signed short * block, unsigned char * dest,
+			      int stride);
+void mpeg2_idct_add_altivec (signed short * block, unsigned char * dest,
+			     int stride);
+# endif /* ENABLE_ALTIVEC */
 #endif /* HOST_OS_DARWIN */
 void mpeg2_idct_altivec_init (void);