diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 917278ee07e..c5dbcf0aeaa 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-08-15  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/aarch64/aarch64.c (aarch64_simd_vector_alignment): Return
+	16 for SVE predicates even if they are fixed-length.
+
 2019-08-15  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* config/aarch64/aarch64-sve.md (and<PRED_ALL:mode>3): Make the
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index ca220b5f140..77794582fbc 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -15915,11 +15915,13 @@ aarch64_simd_attr_length_rglist (machine_mode mode)
 static HOST_WIDE_INT
 aarch64_simd_vector_alignment (const_tree type)
 {
+  /* ??? Checking the mode isn't ideal, but VECTOR_BOOLEAN_TYPE_P can
+     be set for non-predicate vectors of booleans.  Modes are the most
+     direct way we have of identifying real SVE predicate types.  */
+  if (GET_MODE_CLASS (TYPE_MODE (type)) == MODE_VECTOR_BOOL)
+    return 16;
   if (TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
-    /* ??? Checking the mode isn't ideal, but VECTOR_BOOLEAN_TYPE_P can
-       be set for non-predicate vectors of booleans.  Modes are the most
-       direct way we have of identifying real SVE predicate types.  */
-    return GET_MODE_CLASS (TYPE_MODE (type)) == MODE_VECTOR_BOOL ? 16 : 128;
+    return 128;
   return wi::umin (wi::to_wide (TYPE_SIZE (type)), 128).to_uhwi ();
 }