diff --git a/big-endian.patch b/big-endian.patch
new file mode 100644
index 0000000..6ec948c
--- /dev/null
+++ b/big-endian.patch
@@ -0,0 +1,16 @@
+Index: netpbm-10.86.3/converter/pbm/pbmtozinc.c
+===================================================================
+--- netpbm-10.86.3.orig/converter/pbm/pbmtozinc.c
++++ netpbm-10.86.3/converter/pbm/pbmtozinc.c
+@@ -107,7 +107,10 @@ packer_putitem(Packer * const packerP) {
+         putchar(' ');
+ 
+     ++packerP->itemsperline;
+-    printf ("0x%02x%02x", packerP->item & 255, packerP->item >> 8);
++    if (BYTE_ORDER == LITTLE_ENDIAN)
++        printf ("0x%02x%02x", packerP->item & 255, packerP->item >> 8);
++    else
++        printf ("0x%02x%02x", packerP->item >> 8, packerP->item & 255);
+ 
+ }
+ 
diff --git a/netpbm.changes b/netpbm.changes
index 0ed0285..7d51a8f 100644
--- a/netpbm.changes
+++ b/netpbm.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Jul  8 07:49:42 UTC 2019 - Andreas Schwab <schwab@suse.de>
+
+- signed-char.patch: fix bad use of plain char
+- big-endian.patch: fix dependency on byte order
+
 -------------------------------------------------------------------
 Fri May 31 09:32:34 UTC 2019 - pgajdos@suse.com
 
diff --git a/netpbm.spec b/netpbm.spec
index 962ab83..dadbe57 100644
--- a/netpbm.spec
+++ b/netpbm.spec
@@ -41,6 +41,10 @@ Patch4:         %{name}-security-code.patch
 Patch5:         %{name}-security-scripts.patch
 Patch6:         %{name}-gcc-warnings.patch
 Patch7:         makeman-py3.patch
+# PATCH-FIX-UPSTREAM fix bad use of plain char
+Patch8:         signed-char.patch
+# PATCH-FIX-UPSTREAM fix dependency on byte order
+Patch9:         big-endian.patch
 BuildRequires:  flex
 BuildRequires:  libjasper-devel
 BuildRequires:  libjpeg-devel
@@ -94,6 +98,8 @@ source package.
 %patch5 -p1
 %patch6 -p1
 %patch7 -p1
+%patch8 -p1
+%patch9 -p1
 mkdir pnmtopalm # for %%doc pnmtopalm
 cp -p converter/other/pnmtopalm/{LICENSE,README} pnmtopalm
 
diff --git a/signed-char.patch b/signed-char.patch
new file mode 100644
index 0000000..5d54af2
--- /dev/null
+++ b/signed-char.patch
@@ -0,0 +1,22 @@
+Index: netpbm-10.86.3/converter/other/pnmtopalm/palmtopnm.c
+===================================================================
+--- netpbm-10.86.3.orig/converter/other/pnmtopalm/palmtopnm.c
++++ netpbm-10.86.3/converter/other/pnmtopalm/palmtopnm.c
+@@ -823,7 +823,7 @@ readPackBitsRow16(FILE *          const
+     unsigned int j;
+ 
+     for (j = 0;  j < bytesPerRow; ) {
+-        char incount;
++        signed char incount;
+         pm_readchar(ifP, &incount);
+         if (incount < 0) {
+             /* How do we handle incount == -128 ? */
+@@ -865,7 +865,7 @@ readPackBitsRow(FILE *          const if
+     unsigned int j;
+ 
+     for (j = 0;  j < bytesPerRow; ) {
+-        char incount;
++        signed char incount;
+         pm_readchar(ifP, &incount);
+         if (incount < 0) {
+             /* How do we handle incount == -128 ? */