diff --git a/SEL32/sel32_chan.c b/SEL32/sel32_chan.c
index 3d771a0..c1be015 100644
--- a/SEL32/sel32_chan.c
+++ b/SEL32/sel32_chan.c
@@ -24,7 +24,6 @@
 
 /* Handle Class E and F channel I/O operations */
 #include "sel32_defs.h"
-#include "sim_defs.h"
 
 /* Class E I/O device instruction format */
 /* |-----------+-----------+-----------+-----------+-----------+-----------+-----------+-----------| */
diff --git a/SEL32/sel32_clk.c b/SEL32/sel32_clk.c
index 84a27bf..3f2a851 100644
--- a/SEL32/sel32_clk.c
+++ b/SEL32/sel32_clk.c
@@ -32,7 +32,6 @@
 */
 
 #include "sel32_defs.h"
-#include "sim_defs.h"
 
 #ifdef NUM_DEVS_RTOM
 
diff --git a/SEL32/sel32_con.c b/SEL32/sel32_con.c
index 853888f..34617d3 100644
--- a/SEL32/sel32_con.c
+++ b/SEL32/sel32_con.c
@@ -31,7 +31,6 @@
 */
 
 #include "sel32_defs.h"
-#include "sim_defs.h"
 
 #ifdef NUM_DEVS_CON
 
diff --git a/SEL32/sel32_iop.c b/SEL32/sel32_iop.c
index a4adffc..cad7c68 100644
--- a/SEL32/sel32_iop.c
+++ b/SEL32/sel32_iop.c
@@ -32,7 +32,6 @@
 */
 
 #include "sel32_defs.h"
-#include "sim_defs.h"
 
 #ifdef NUM_DEVS_IOP
 
diff --git a/SEL32/sel32_lpr.c b/SEL32/sel32_lpr.c
index 64e1670..3d9bba9 100644
--- a/SEL32/sel32_lpr.c
+++ b/SEL32/sel32_lpr.c
@@ -30,7 +30,6 @@
 */
 
 #include "sel32_defs.h"
-#include "sim_defs.h"
 #include <ctype.h>
 
 /****  COMMANDS TO PRINT BUFFER THEN DO FORMS CONTROL */