diff --git a/src/sage/symbolic/ginac/constant.cpp b/src/sage/symbolic/ginac/constant.cpp
index 64e225f0213..f768e021c4e 100644
--- a/src/sage/symbolic/ginac/constant.cpp
+++ b/src/sage/symbolic/ginac/constant.cpp
@@ -20,7 +20,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #include <Python.h>
 #include "py_funcs.h"
 #include "constant.h"
diff --git a/src/sage/symbolic/ginac/ex.cpp b/src/sage/symbolic/ginac/ex.cpp
index a4783ab0c8b..d4f077153dc 100644
--- a/src/sage/symbolic/ginac/ex.cpp
+++ b/src/sage/symbolic/ginac/ex.cpp
@@ -20,7 +20,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #include <Python.h>
 #include "ex.h"
 #include "ex_utils.h"
diff --git a/src/sage/symbolic/ginac/fderivative.cpp b/src/sage/symbolic/ginac/fderivative.cpp
index a47db8823f3..8621ba598a8 100644
--- a/src/sage/symbolic/ginac/fderivative.cpp
+++ b/src/sage/symbolic/ginac/fderivative.cpp
@@ -20,7 +20,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #include <Python.h>
 #include "py_funcs.h"
 #include "fderivative.h"
diff --git a/src/sage/symbolic/ginac/function.cpp b/src/sage/symbolic/ginac/function.cpp
index 67d608c6240..62824b46946 100644
--- a/src/sage/symbolic/ginac/function.cpp
+++ b/src/sage/symbolic/ginac/function.cpp
@@ -20,7 +20,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include "py_funcs.h"
diff --git a/src/sage/symbolic/ginac/inifcns_hyperg.cpp b/src/sage/symbolic/ginac/inifcns_hyperg.cpp
index 1ad2ff785b1..a1c037fc96d 100644
--- a/src/sage/symbolic/ginac/inifcns_hyperg.cpp
+++ b/src/sage/symbolic/ginac/inifcns_hyperg.cpp
@@ -23,7 +23,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #include <Python.h>
 #include "py_funcs.h"
 #include "inifcns.h"
diff --git a/src/sage/symbolic/ginac/numeric.cpp b/src/sage/symbolic/ginac/numeric.cpp
index a9bbfba9e15..e973390ffa2 100644
--- a/src/sage/symbolic/ginac/numeric.cpp
+++ b/src/sage/symbolic/ginac/numeric.cpp
@@ -49,7 +49,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define register
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include "flint/fmpz.h"