diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 427c2573a1a..0ab06c099df 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2019-07-30  Uroš Bizjak  <ubizjak@gmail.com>
+
+	* config/alpha/alpha.c (alpha_option_override): Quote a C type.
+
 2019-07-30  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	* config/arm/thumb2.md (thumb2_movsi_insn): Adjust literal offset.
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 10656bea58c..132af0b592a 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -526,7 +526,7 @@ alpha_option_override (void)
 	  alpha_fptm = ALPHA_FPTM_SU;
 	}
       if (target_flags_explicit & MASK_LONG_DOUBLE_128)
-	warning (0, "128-bit long double not supported for VAX floats");
+	warning (0, "128-bit %<long double%> not supported for VAX floats");
       target_flags &= ~MASK_LONG_DOUBLE_128;
     }