diff --git a/src/frontend/inp.c b/src/frontend/inp.c
index a32cf436b..504a24dbc 100644
--- a/src/frontend/inp.c
+++ b/src/frontend/inp.c
@@ -62,8 +62,6 @@ static wordlist *inp_savecurrents(struct line *deck, struct line *options, wordl
 void line_free_x(struct line *deck, bool recurse);
 void create_circbyline(char *line);
 
-void inp_evaluate_temper(void);
-
 extern bool ft_batchmode;
 
 /* structure used to save expression parse trees for .model and
diff --git a/src/include/ngspice/cktdefs.h b/src/include/ngspice/cktdefs.h
index 511cf6f22..aea7f120a 100644
--- a/src/include/ngspice/cktdefs.h
+++ b/src/include/ngspice/cktdefs.h
@@ -449,4 +449,6 @@ extern int NIpred(CKTcircuit *ckt);
 extern IFfrontEnd *SPfrontEnd;
 extern bool expr_w_temper;
 
+extern void inp_evaluate_temper(void);
+
 #endif
diff --git a/src/spicelib/analysis/dctrcurv.c b/src/spicelib/analysis/dctrcurv.c
index fc449163f..75f2bf9f9 100644
--- a/src/spicelib/analysis/dctrcurv.c
+++ b/src/spicelib/analysis/dctrcurv.c
@@ -27,8 +27,6 @@ Modified: 1999 Paolo Nenzi
 static double actval, actdiff;
 #endif
 
-extern void inp_evaluate_temper(void);
-
 
 int
 DCtrCurv(CKTcircuit *ckt, int restart)