diff --git a/Docs/source/build_system.rst b/Docs/source/build_system.rst
index 832315fe51..2949b2bcf1 100644
--- a/Docs/source/build_system.rst
+++ b/Docs/source/build_system.rst
@@ -135,12 +135,8 @@ Microphysics Parameters
 
     .. index:: USE_REACT, general_null, GENERAL_NET_INPUTS, NETWORK_DIR, INTEGRATOR_DIR
 
-  * ``USE_REACT_SPARSE_JACOBIAN``
-
-  * ``USE_SPARSE_STOP_ON_OOB``
-
-  * ``EOS_DIR``: the equation of state to use.  This will be a subdirectory under the
-    Microphysics repo.
+    * ``EOS_DIR``: the equation of state to use.  This will be a subdirectory under the
+      Microphysics repo.
 
     .. index:: EOS_DIR
 
@@ -275,5 +271,3 @@ This is the current build system process.
 
 For all of this to work, we need the ``tmp_build_dir/s`` directory to
 be first in the vpath, so our modified sources are found and used.
-
-
diff --git a/Exec/Make.Castro b/Exec/Make.Castro
index 106ef51cc0..e940acd2eb 100644
--- a/Exec/Make.Castro
+++ b/Exec/Make.Castro
@@ -201,17 +201,6 @@ ifeq ($(USE_REACT), TRUE)
   DEFINES += -DREACTIONS
 endif
 
-ifeq ($(USE_REACT_SPARSE_JACOBIAN), TRUE)
-  DEFINES += -DREACT_SPARSE_JACOBIAN
-
-  # The following is sometimes useful to turn on for debugging sparse J indices
-  # (if a get/set/scale is called with (row, col) not in the sparse J, stop)
-  # Otherwise, set/scale do nothing, and get returns 0.
-  ifeq ($(USE_SPARSE_STOP_ON_OOB), TRUE)
-    DEFINES += -DSPARSE_STOP_ON_OOB
-  endif
-endif
-
 ifeq ($(USE_SIMPLIFIED_SDC), TRUE)
   DEFINES += -DSDC_EVOLVE_ENERGY
 endif