diff --git a/configure b/configure
index de3153f2eb..481bd3b66d 100755
--- a/configure
+++ b/configure
@@ -5306,7 +5306,7 @@ fi
   # -Wdeclaration-after-statement isn't applicable for C++.  Specific C files
   # disable it, so AC_SUBST the negative form.
   PERMIT_DECLARATION_AFTER_STATEMENT=
-  if test x"save_$CFLAGS" != x"$CFLAGS"; then
+  if test x"$save_CFLAGS" != x"$CFLAGS"; then
     PERMIT_DECLARATION_AFTER_STATEMENT=-Wno-declaration-after-statement
   fi
 
diff --git a/configure.in b/configure.in
index 0373c155f0..9c7a9738bc 100644
--- a/configure.in
+++ b/configure.in
@@ -481,7 +481,7 @@ if test "$GCC" = yes -a "$ICC" = no; then
   # -Wdeclaration-after-statement isn't applicable for C++.  Specific C files
   # disable it, so AC_SUBST the negative form.
   PERMIT_DECLARATION_AFTER_STATEMENT=
-  if test x"save_$CFLAGS" != x"$CFLAGS"; then
+  if test x"$save_CFLAGS" != x"$CFLAGS"; then
     PERMIT_DECLARATION_AFTER_STATEMENT=-Wno-declaration-after-statement
   fi
   AC_SUBST(PERMIT_DECLARATION_AFTER_STATEMENT)