diff --git a/src/frontend/numparam/general.h b/src/frontend/numparam/general.h
index 1a9018f5a..0528e34aa 100644
--- a/src/frontend/numparam/general.h
+++ b/src/frontend/numparam/general.h
@@ -25,7 +25,6 @@ void cadd(SPICE_DSTRINGPTR s, char c);
 void naddll(SPICE_DSTRINGPTR s, long long n);
 void cins(SPICE_DSTRINGPTR s, char c);
 void sins(SPICE_DSTRINGPTR s, const char *t);
-int cpos(char c, char *s);
 int spos_(char *sub, const char *s);
 bool ci_prefix(const char *p, const char *s);
 int length(const char *s);
diff --git a/src/frontend/numparam/mystring.c b/src/frontend/numparam/mystring.c
index 57f80b2db..a0786c084 100644
--- a/src/frontend/numparam/mystring.c
+++ b/src/frontend/numparam/mystring.c
@@ -154,24 +154,6 @@ sins(SPICE_DSTRINGPTR dstr_p, const char *t)
 }
 
 
-int
-cpos(char c, char *s)
-/* return position of c in s, or 0 if not found.
- * BUG, Pascal inherited: first char is at 1, not 0 !
- * No longer!  Now position is C-based to make life easier.
- */
-{
-    int i = 0;
-    while ((s[i] != c) && (s[i] != '\0'))
-        i++;
-
-    if (s[i] == c)
-        return i;
-    else
-        return -1;
-}
-
-
 char
 upcase(char c)
 {
diff --git a/src/frontend/numparam/spicenum.c b/src/frontend/numparam/spicenum.c
index e45a4c52c..9ff1f4688 100644
--- a/src/frontend/numparam/spicenum.c
+++ b/src/frontend/numparam/spicenum.c
@@ -371,7 +371,7 @@ transform(dico_t *dico, SPICE_DSTRINGPTR dstr_p, bool incontrol,
         category = 'X';
     } else if (s[0] == '+') {   /* continuation line */
         category = '+';
-    } else if (cpos(s[0], "*$#") < 0) {
+    } else if (!strchr("*$#", s[0])) {
         /* not a comment line! */
         n = stripbraces(dstr_p);
         if (n > 0)
diff --git a/src/frontend/numparam/xpressn.c b/src/frontend/numparam/xpressn.c
index 4b12cfc09..5cdddcf45 100644
--- a/src/frontend/numparam/xpressn.c
+++ b/src/frontend/numparam/xpressn.c
@@ -732,7 +732,7 @@ fetchoperator(dico_t *dico,
     } else if (c == '^') {
         state = S_binop;
         level = 2;
-    } else if (cpos(c, "=<>#GL") >= 0) {
+    } else if (strchr("=<>#GL", c)) {
         state = S_binop;
         level = 5;
     } else if (c == 'A') {
@@ -1419,7 +1419,7 @@ getexpress(char *s, SPICE_DSTRINGPTR tstr_p, int *pi)
                 } while ((i <= ls) && !((d == ')') && (level <= 0)));
             }
 
-        } while (!(cpos (c, ",;)}") >= 0)); /* legal separators */
+        } while (!strchr(",;)}", c)); /* legal separators */
 
         tpe = NUPA_REAL;
     }
@@ -1703,9 +1703,10 @@ nupa_subcktcall(dico_t *dico, char *s, char *x, char *inst_name)
 
                 u_p = spice_dstring_value(&ustr);
                 if (u_p[0]) {
+                    char *dollar = strchr(spice_dstring_value(&idlist), '$');
                     narg++;
-                    k = cpos('$', spice_dstring_value(&idlist));
-                    if (k >= 0) {
+                    if (dollar) {
+                        k = (int) (dollar - spice_dstring_value(&idlist));
                         /* replace dollar with expression string u */
                         pscopy(&vstr, spice_dstring_value(&idlist), 0, k);
                         sadd(&vstr, spice_dstring_value(&ustr));