diff --git a/src/include/ngspice/macros.h b/src/include/ngspice/macros.h
index 4d2fafd0a..6609a6433 100644
--- a/src/include/ngspice/macros.h
+++ b/src/include/ngspice/macros.h
@@ -35,7 +35,6 @@
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 #define ABS(a)    ((a) < 0.0 ? -(a) : (a))
 #define SGN(a)    ((a) < 0.0 ? -(1.0) : (1.0))
-#define SIGN(a,b) ( b >= 0 ? (a >= 0 ? a : - a) : (a >= 0 ? - a : a))
 #define SWAP(type, a, b)                        \
     do {                                        \
         type SWAP_macro_local = a;              \
diff --git a/src/spicelib/analysis/dctrcurv.c b/src/spicelib/analysis/dctrcurv.c
index 702c3c926..97e77d1c1 100644
--- a/src/spicelib/analysis/dctrcurv.c
+++ b/src/spicelib/analysis/dctrcurv.c
@@ -218,8 +218,8 @@ DCtrCurv(CKTcircuit *ckt, int restart)
 
         if (job->TRCVvType[i] == vcode) { /* voltage source */
             if ((((VSRCinstance*)(job->TRCVvElt[i]))->VSRCdcValue) *
-                SIGN(1.0, job->TRCVvStep[i]) -
-                SIGN(1.0, job->TRCVvStep[i]) * job->TRCVvStop[i] >
+                SGN(job->TRCVvStep[i]) -
+                SGN(job->TRCVvStep[i]) * job->TRCVvStop[i] >
                 DBL_EPSILON * 1e+03)
             {
                 i++;
@@ -231,8 +231,8 @@ DCtrCurv(CKTcircuit *ckt, int restart)
             }
         } else if (job->TRCVvType[i] == icode) { /* current source */
             if ((((ISRCinstance*)(job->TRCVvElt[i]))->ISRCdcValue) *
-                SIGN(1.0, job->TRCVvStep[i]) -
-                SIGN(1.0, job->TRCVvStep[i]) * job->TRCVvStop[i] >
+                SGN(job->TRCVvStep[i]) -
+                SGN(job->TRCVvStep[i]) * job->TRCVvStop[i] >
                 DBL_EPSILON * 1e+03)
             {
                 i++;
@@ -244,8 +244,8 @@ DCtrCurv(CKTcircuit *ckt, int restart)
             }
         } else if (job->TRCVvType[i] == rcode) { /* resistance */
             if ((((RESinstance*)(job->TRCVvElt[i]))->RESresist) *
-                SIGN(1.0, job->TRCVvStep[i]) -
-                SIGN(1.0, job->TRCVvStep[i]) * job->TRCVvStop[i] >
+                SGN(job->TRCVvStep[i]) -
+                SGN(job->TRCVvStep[i]) * job->TRCVvStop[i] >
                 DBL_EPSILON * 1e+03)
             {
                 i++;
@@ -256,8 +256,8 @@ DCtrCurv(CKTcircuit *ckt, int restart)
                 goto nextstep;
             }
         } else if (job->TRCVvType[i] == TEMP_CODE) { /* temp sweep */
-            if (((ckt->CKTtemp) - CONSTCtoK) * SIGN(1.0, job->TRCVvStep[i]) -
-                SIGN(1.0, job->TRCVvStep[i]) * job->TRCVvStop[i] >
+            if (((ckt->CKTtemp) - CONSTCtoK) * SGN(job->TRCVvStep[i]) -
+                SGN(job->TRCVvStep[i]) * job->TRCVvStop[i] >
                 DBL_EPSILON * 1e+03)
             {
                 i++;