diff --git a/src/frontend/numparam/general.h b/src/frontend/numparam/general.h
index e85aa757a..f8683fb75 100644
--- a/src/frontend/numparam/general.h
+++ b/src/frontend/numparam/general.h
@@ -41,6 +41,5 @@ int yes_or_no(void);
 int freadstr(FILE *f, SPICE_DSTRINGPTR dstr_p);
 
 double np_round(double d);        // sjb to avoid clash with round() in math.h
-double np_trunc(double x);        // sjb to avoid clash with trunc() in math.h
 double absf(double x); /* abs */
 long absi(long i);
diff --git a/src/frontend/numparam/mystring.c b/src/frontend/numparam/mystring.c
index 9cebee928..c773d6893 100644
--- a/src/frontend/numparam/mystring.c
+++ b/src/frontend/numparam/mystring.c
@@ -479,13 +479,3 @@ np_round(double r)
 {
     return floor(r + 0.5);
 }
-
-
-double
-np_trunc(double r)
-{
-    if (r >= 0.0)
-        return floor(r);
-    else
-        return ceil(r);
-}
diff --git a/src/frontend/numparam/xpressn.c b/src/frontend/numparam/xpressn.c
index 49b751c98..c2cbfb190 100644
--- a/src/frontend/numparam/xpressn.c
+++ b/src/frontend/numparam/xpressn.c
@@ -843,11 +843,11 @@ operate(char op, double x, double y)
             x = z;
         break;
     case '%':                   /* % */
-        t = np_trunc(x / y);
+        t = trunc(x / y);
         x = x - y * t;
         break;
     case '\\':                  /* / */
-        x = np_trunc(fabs(x / y));
+        x = trunc(fabs(x / y));
         break;
     }