diff --git a/src/configure.in b/src/configure.in
index 3ce50068547..a6f86424b2f 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1,4 +1,4 @@
- dnl Process this file with autoconf to produce a configure script.
+dnl Process this file with autoconf to produce a configure script.
 AC_INIT(backend/access/common/heaptuple.c)
 AC_PREFIX_DEFAULT(/usr/local/pgsql)
 
@@ -279,7 +279,7 @@ dnl We need some explanatory text here.
 AC_MSG_CHECKING(setting ASSERT CHECKING)
 AC_ARG_ENABLE(
    cassert,
-   [  --enable-cassert	      enable assertion checks (debugging) ],
+   [  --enable-cassert	  enable assertion checks (debugging) ],
    AC_DEFINE(USE_ASSERT_CHECKING) AC_MSG_RESULT(enabled),
    AC_MSG_RESULT(disabled)
 )
diff --git a/src/include/config.h.in b/src/include/config.h.in
index 62849411e83..9d76e3af6a6 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -207,7 +207,7 @@ extern void srandom(int seed);
 /* Set to 1 if you want CYR_RECODE (cyrillic recode) */
 #undef CYR_RECODE
 
-/* Set to 1 if you want to Disable ASSERT CHECKING */
+/* Set to 1 if you want to Enable ASSERT CHECKING */
 #undef USE_ASSERT_CHECKING
 
 /*