diff --git a/src/backend/port/tas/solaris_sparc.s b/src/backend/port/tas/solaris_sparc.s
index f2ef5de78d0..de453b5dec3 100644
--- a/src/backend/port/tas/solaris_sparc.s
+++ b/src/backend/port/tas/solaris_sparc.s
@@ -1,6 +1,6 @@
-/=======================================================================
-/ solaris_sparc.s -- compare and swap for solaris_sparc
-/=======================================================================
+!=======================================================================
+! solaris_sparc.s -- compare and swap for solaris_sparc
+!=======================================================================
 
 #if defined(__sparcv9) || defined(__sparc)
 
diff --git a/src/backend/port/tas/solaris_x86.s b/src/backend/port/tas/solaris_x86.s
index 32abb2e6ad1..d8243107789 100644
--- a/src/backend/port/tas/solaris_x86.s
+++ b/src/backend/port/tas/solaris_x86.s
@@ -1,8 +1,8 @@
-/=======================================================================
-/ solaris_i386.s -- compare and swap for solaris_i386
-/=======================================================================
+!=======================================================================
+! solaris_i386.s -- compare and swap for solaris_i386
+!=======================================================================
 
-/ Fortunately the Sun compiler understands cpp conditionals
+! Fortunately the Sun compiler can process cpp conditionals with -P
 
          .file   "tas.s"