diff --git a/src/powerpc/ffitarget.h b/src/powerpc/ffitarget.h
index b47b0f5d..84aa5860 100644
--- a/src/powerpc/ffitarget.h
+++ b/src/powerpc/ffitarget.h
@@ -142,19 +142,30 @@ typedef enum ffi_abi {
 # define FFI_EXTRA_CIF_FIELDS unsigned nfixedargs
 #endif
 
-/* For additional types like the below, take care about the order in
-   ppc_closures.S. They must follow after the FFI_TYPE_LAST.  */
+/* ppc_closure.S and linux64_closure.S expect this.  */
+#define FFI_PPC_TYPE_LAST FFI_TYPE_POINTER
+
+/* We define additional types below.  If generic types are added that
+   must be supported by powerpc libffi then it is likely that
+   FFI_PPC_TYPE_LAST needs increasing *and* the jump tables in
+   ppc_closure.S and linux64_closure.S be extended.  */
+
+#if !(FFI_TYPE_LAST == FFI_PPC_TYPE_LAST		\
+      || (FFI_TYPE_LAST == FFI_TYPE_COMPLEX		\
+	  && !defined FFI_TARGET_HAS_COMPLEX_TYPE))
+# error "You likely have a broken powerpc libffi"
+#endif
 
 /* Needed for soft-float long-double-128 support.  */
-#define FFI_TYPE_UINT128 (FFI_TYPE_LAST + 1)
+#define FFI_TYPE_UINT128 (FFI_PPC_TYPE_LAST + 1)
 
 /* Needed for FFI_SYSV small structure returns.  */
-#define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_TYPE_LAST + 2)
+#define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_PPC_TYPE_LAST + 2)
 
 /* Used by ELFv2 for homogenous structure returns.  */
-#define FFI_V2_TYPE_FLOAT_HOMOG		(FFI_TYPE_LAST + 1)
-#define FFI_V2_TYPE_DOUBLE_HOMOG	(FFI_TYPE_LAST + 2)
-#define FFI_V2_TYPE_SMALL_STRUCT	(FFI_TYPE_LAST + 3)
+#define FFI_V2_TYPE_FLOAT_HOMOG		(FFI_PPC_TYPE_LAST + 1)
+#define FFI_V2_TYPE_DOUBLE_HOMOG	(FFI_PPC_TYPE_LAST + 2)
+#define FFI_V2_TYPE_SMALL_STRUCT	(FFI_PPC_TYPE_LAST + 3)
 
 #if _CALL_ELF == 2
 # define FFI_TRAMPOLINE_SIZE 32