diff --git a/libpng.3 b/libpng.3
index fcb2f89f2..dca62eb63 100644
--- a/libpng.3
+++ b/libpng.3
@@ -538,6 +538,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta103
 
 \fI\fB
 
+\fBjmp_buf* png_set_longjmp_fn (png_structp \fP\fIpng_ptr\fP\fB, png_longjmp_ptr \fP\fIlongjmp_fn\fP\fB, size_t \fIjmp_buf_size\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_mem_fn(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
 
 \fI\fB
diff --git a/libpngpf.3 b/libpngpf.3
index e7b2cd64e..b3a913ee1 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -443,12 +443,6 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta103
 
 \fI\fB
 
-\fBjmp_buf* png_set_longjmp_fn (png_structp \fP\fIpng_ptr\fP\fB, png_longjmp_ptr \fP\fIlongjmp_fn\fP\fB, size_t \fIjmp_buf_size\fP\fB);\fP
-
-\fI\fB
-
-\fI\fB
-
 \fBvoid png_process_IDAT_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP
 
 \fI\fB
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index ec59d0b13..b83d8cbb8 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -255,3 +255,4 @@ EXPORTS
   png_check_cHRM_fixed @217
   png_calloc @218
   png_longjmp_ptr @219
+  png_set_longjmp_fn @220
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index 53b67bc36..517be027b 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -215,6 +215,7 @@ EXPORTS
   png_check_cHRM_fixed
   png_calloc
   png_longjmp_ptr
+  png_set_longjmp_fn
 
 ; These are not present when libpng is compiled with PNG_NO_GLOBAL_ARRAYS
   png_libpng_ver
diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index eedb112a8..7163590f0 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -210,3 +210,4 @@ EXPORTS
   png_check_cHRM_fixed
   png_calloc
   png_longjmp_ptr
+  png_set_longjmp_fn