diff --git a/Makefile.in b/Makefile.in
index 94dd987..08cef5c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -137,7 +137,6 @@ EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
-HIST_SIZE = @HIST_SIZE@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
diff --git a/examples/Makefile.in b/examples/Makefile.in
index a69b433..baf09b7 100644
--- a/examples/Makefile.in
+++ b/examples/Makefile.in
@@ -117,7 +117,6 @@ EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
-HIST_SIZE = @HIST_SIZE@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
diff --git a/include/Makefile.in b/include/Makefile.in
index 839ab9c..ce74ba4 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -108,7 +108,6 @@ EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
-HIST_SIZE = @HIST_SIZE@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
diff --git a/man/Makefile.in b/man/Makefile.in
index cc3d148..157507b 100644
--- a/man/Makefile.in
+++ b/man/Makefile.in
@@ -107,7 +107,6 @@ EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
-HIST_SIZE = @HIST_SIZE@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
diff --git a/src/Makefile.in b/src/Makefile.in
index 117c27c..bcbaedb 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -138,7 +138,6 @@ EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
-HIST_SIZE = @HIST_SIZE@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@