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-rw-r--r--lib/libpammap.c8
-rw-r--r--lib/pammap.h6
2 files changed, 8 insertions, 6 deletions
diff --git a/lib/libpammap.c b/lib/libpammap.c
index 781f6f88..1ebc639c 100644
--- a/lib/libpammap.c
+++ b/lib/libpammap.c
@@ -438,8 +438,8 @@ pnm_alloctupletable(const struct pam * const pamP,
 
 
 void
-pnm_freetupletable(struct pam * const pamP,
-                   tupletable   const tupletable) {
+pnm_freetupletable(const struct pam * const pamP,
+                   tupletable         const tupletable) {
 
     /* Note that the address 'tupletable' is, to the operating system, 
        the address of a larger block of memory that contains not only 
@@ -453,8 +453,8 @@ pnm_freetupletable(struct pam * const pamP,
 
 
 void
-pnm_freetupletable2(struct pam * const pamP,
-                    tupletable2  const tupletable) {
+pnm_freetupletable2(const struct pam * const pamP,
+                    tupletable2        const tupletable) {
 
     pnm_freetupletable(pamP, tupletable.table);
 }
diff --git a/lib/pammap.h b/lib/pammap.h
index f11b1d7a..a53a9c23 100644
--- a/lib/pammap.h
+++ b/lib/pammap.h
@@ -72,10 +72,12 @@ tupletable
 pnm_alloctupletable(const struct pam * const pamP, unsigned int const size);
 
 void
-pnm_freetupletable(struct pam * const pamP, tupletable const tupletable);
+pnm_freetupletable(const struct pam * const pamP,
+                   tupletable         const tupletable);
 
 void
-pnm_freetupletable2(struct pam * const pamP, tupletable2 const tupletable);
+pnm_freetupletable2(const struct pam * const pamP,
+                    tupletable2        const tupletable);
 
 tuplehash
 pnm_createtuplehash(void);