diff --git a/configure b/configure
index 1480515a1bfb39cb37a990d8ef4d85ebba521bf6..876a19bb0f2486035ef622bbde6db0cf644c85f6 100755
--- a/configure
+++ b/configure
@@ -924,6 +924,7 @@ HAVE_LIST="
     truncf
     VirtualAlloc
     winsock2_h
+    xform_asm
     yasm
 "
 
@@ -1908,6 +1909,7 @@ fi
 
 enabled ppc && check_asm dcbzl '"dcbzl 0, 1"'
 enabled ppc && check_asm ppc4xx '"maclhw r10, r11, r12"'
+enabled ppc && check_asm xform_asm '"lwzx 0, %y0" :: "Z"(*(int*)0)'
 
 # check for SIMD availability
 
diff --git a/libavutil/ppc/intreadwrite.h b/libavutil/ppc/intreadwrite.h
index f9898172c560de49fa5028534f3f1eeef174a524..7bc2b2d4b331074a40f140c0dc10e778a466d27c 100644
--- a/libavutil/ppc/intreadwrite.h
+++ b/libavutil/ppc/intreadwrite.h
@@ -24,6 +24,8 @@
 #include <stdint.h>
 #include "config.h"
 
+#if HAVE_XFORM_ASM
+
 #define AV_RL16 AV_RL16
 static inline uint16_t AV_RL16(const void *p)
 {
@@ -93,6 +95,8 @@ static inline void AV_WL64(void *p, uint64_t v)
 
 #endif /* HAVE_LDBRX */
 
+#endif /* HAVE_XFORM_ASM */
+
 /*
  * GCC fails miserably on the packed struct version which is used by
  * default, so we override it here.