diff --git a/src/c/numbers/divide.d b/src/c/numbers/divide.d
index e039509a6..f2499d124 100644
--- a/src/c/numbers/divide.d
+++ b/src/c/numbers/divide.d
@@ -28,7 +28,7 @@
 	@(return num)
 @)
 
-#if 1
+#ifdef MATH_DISPATCH2_BEGIN
 
 static cl_object
 complex_divide(cl_object ar, cl_object ai, cl_object br, cl_object bi)
diff --git a/src/c/numbers/minus.d b/src/c/numbers/minus.d
index 032b5221d..350f9dc42 100644
--- a/src/c/numbers/minus.d
+++ b/src/c/numbers/minus.d
@@ -27,7 +27,7 @@
 	@(return diff)
 @)
 
-#if 1
+#ifdef MATH_DISPATCH2_BEGIN
 
 cl_object
 ecl_minus(cl_object x, cl_object y)
diff --git a/src/c/numbers/plus.d b/src/c/numbers/plus.d
index 0d2d4ecfd..dbd2e26a9 100644
--- a/src/c/numbers/plus.d
+++ b/src/c/numbers/plus.d
@@ -25,7 +25,7 @@
 	@(return sum)
 @)
 
-#if 1
+#ifdef MATH_DISPATCH2_BEGIN
 
 cl_object
 ecl_plus(cl_object x, cl_object y)
diff --git a/src/c/numbers/times.d b/src/c/numbers/times.d
index c21a39666..fce49f1c3 100644
--- a/src/c/numbers/times.d
+++ b/src/c/numbers/times.d
@@ -25,7 +25,7 @@
 	@(return prod)
 @)
 
-#if 1
+#ifdef MATH_DISPATCH2_BEGIN
 
 cl_object
 ecl_times(cl_object x, cl_object y)