diff --git a/src/include/ngspice/devdefs.h b/src/include/ngspice/devdefs.h
index be06f961d..bf657e998 100644
--- a/src/include/ngspice/devdefs.h
+++ b/src/include/ngspice/devdefs.h
@@ -160,6 +160,7 @@ extern int        DEVmaxnum;    /* size of DEVices array */
 # define IOPXU(a,b,c,d)  { a, b, c|IF_SET|IF_ASK|IF_NONSENSE|IF_UNINTERESTING,\
 									d }
 # define IOPQ(a,b,c,d)  { a, b, c|IF_SET|IF_ASK|IF_SETQUERY,		d }
+# define IOPQR(a,b,c,d)  { a, b, c|IF_SET|IF_ASK|IF_SETQUERY|IF_REDUNDANT, d }
 # define IOPQU(a,b,c,d)  { a, b, c|IF_SET|IF_ASK|IF_SETQUERY|IF_UNINTERESTING,\
 									d }
 # define IOPZ(a,b,c,d)  { a, b, c|IF_SET|IF_ASK|IF_CHKQUERY,		d }
diff --git a/src/spicelib/devices/res/res.c b/src/spicelib/devices/res/res.c
index 608eebe28..b6a84714d 100644
--- a/src/spicelib/devices/res/res.c
+++ b/src/spicelib/devices/res/res.c
@@ -49,7 +49,7 @@ IFparm RESmPTable[] = { /* model parameters */
     IOPZ(  "short",  RES_MOD_SHORT,    IF_REAL,"Shortening of resistor"),
     IOPZR( "dlr",    RES_MOD_SHORT,    IF_REAL,"Shortening of resistor"),
     IOPQ(  "tc1",    RES_MOD_TC1,      IF_REAL,"First order temp. coefficient"),
-    IOPR(  "tc1r",   RES_MOD_TC1,      IF_REAL,"First order temp. coefficient"),
+    IOPQR( "tc1r",   RES_MOD_TC1,      IF_REAL,"First order temp. coefficient"),
     IOPQO( "tc2",    RES_MOD_TC2,      IF_REAL,"Second order temp. coefficient"),
     IOPR(  "tc2r",   RES_MOD_TC2,      IF_REAL,"Second order temp. coefficient"),
     IOPQ(  "tce",    RES_MOD_TCE,      IF_REAL,"exponential temp. coefficient"),