diff --git a/ChangeLog b/ChangeLog
index 432186ec6..76ca6752a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,32 @@
+2014-11-24  Jarkko Pöyry  <jarkko.poyry@gmail.com>
+
+	[cff, pfr, psaux, winfonts] Fix Savannah bug #43676.
+
+	Don't cast cmap init function pointers to an incompatible type. 
+
+	Without this patch, the number of parameters between declaration and
+	the real signature differs.  Calling such a function results in
+	undefined behavior.
+
+	  ISO/IEC 9899:TC3 (Committee Draft September 7, 2007)
+	    6.5.2.2 Function calls
+	      9 If the function is defined with a type that is not
+	        compatible with the type (of the expression) pointed to by
+	        the expression that denotes the called function, the
+	        behavior is undefined.
+
+	On certain platforms (c -> js with emscripten) this causes
+	termination of execution or invalid calls because in the emscripten
+	implementation, function pointers of different types are stored in
+	different pointer arrays.  Incorrect pointer type here results in
+	indexing of an incorrect array.
+
+	* src/cff/cffcmap.c (cff_cmap_encoding_init, cff_cmap_unicode_init),
+	src/pfr/pfrcmap.c (pfr_cmap_init), src/psaux/t1cmap.c
+	t1_cmap_standard_init, t1_cmap_expert_init, t1_cmap_custom_init,
+	t1_cmap_unicode_init), src/winfonts/winfnt.c (fnt_cmap_init): Fix
+	signature.
+
 2014-11-24  Werner Lemberg  <wl@gnu.org>
 
 	[sfnt] Fix Savannah bug #43672.
diff --git a/src/cff/cffcmap.c b/src/cff/cffcmap.c
index f6e03c642..52248b2b9 100644
--- a/src/cff/cffcmap.c
+++ b/src/cff/cffcmap.c
@@ -33,12 +33,15 @@
   /*************************************************************************/
 
   FT_CALLBACK_DEF( FT_Error )
-  cff_cmap_encoding_init( CFF_CMapStd  cmap )
+  cff_cmap_encoding_init( CFF_CMapStd  cmap,
+                          FT_Pointer   pointer )
   {
     TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
     CFF_Font      cff      = (CFF_Font)face->extra.data;
     CFF_Encoding  encoding = &cff->encoding;
 
+    FT_UNUSED( pointer );
+
 
     cmap->gids  = encoding->codes;
 
@@ -135,7 +138,8 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  cff_cmap_unicode_init( PS_Unicodes  unicodes )
+  cff_cmap_unicode_init( PS_Unicodes  unicodes,
+                         FT_Pointer   pointer )
   {
     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
     FT_Memory           memory  = FT_FACE_MEMORY( face );
@@ -143,6 +147,8 @@
     CFF_Charset         charset = &cff->charset;
     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 
+    FT_UNUSED( pointer );
+
 
     /* can't build Unicode map for CID-keyed font */
     /* because we don't know glyph names.         */
diff --git a/src/pfr/pfrcmap.c b/src/pfr/pfrcmap.c
index 1f05640cc..90ba0105e 100644
--- a/src/pfr/pfrcmap.c
+++ b/src/pfr/pfrcmap.c
@@ -25,11 +25,14 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  pfr_cmap_init( PFR_CMap  cmap )
+  pfr_cmap_init( PFR_CMap    cmap,
+                 FT_Pointer  pointer )
   {
     FT_Error  error = FT_Err_Ok;
     PFR_Face  face  = (PFR_Face)FT_CMAP_FACE( cmap );
 
+    FT_UNUSED( pointer );
+
 
     cmap->num_chars = face->phy_font.num_chars;
     cmap->chars     = face->phy_font.chars;
diff --git a/src/psaux/t1cmap.c b/src/psaux/t1cmap.c
index 9e5bd34ff..fb1353ae0 100644
--- a/src/psaux/t1cmap.c
+++ b/src/psaux/t1cmap.c
@@ -120,8 +120,12 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  t1_cmap_standard_init( T1_CMapStd  cmap )
+  t1_cmap_standard_init( T1_CMapStd  cmap,
+                         FT_Pointer  pointer )
   {
+    FT_UNUSED( pointer );
+
+
     t1_cmap_std_init( cmap, 0 );
     return 0;
   }
@@ -142,8 +146,12 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  t1_cmap_expert_init( T1_CMapStd  cmap )
+  t1_cmap_expert_init( T1_CMapStd  cmap,
+                       FT_Pointer  pointer )
   {
+    FT_UNUSED( pointer );
+
+
     t1_cmap_std_init( cmap, 1 );
     return 0;
   }
@@ -172,11 +180,14 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  t1_cmap_custom_init( T1_CMapCustom  cmap )
+  t1_cmap_custom_init( T1_CMapCustom  cmap,
+                       FT_Pointer     pointer )
   {
     T1_Face      face     = (T1_Face)FT_CMAP_FACE( cmap );
     T1_Encoding  encoding = &face->type1.encoding;
 
+    FT_UNUSED( pointer );
+
 
     cmap->first   = encoding->code_first;
     cmap->count   = (FT_UInt)( encoding->code_last - cmap->first );
@@ -272,12 +283,15 @@
 
 
   FT_CALLBACK_DEF( FT_Error )
-  t1_cmap_unicode_init( PS_Unicodes  unicodes )
+  t1_cmap_unicode_init( PS_Unicodes  unicodes,
+                        FT_Pointer   pointer )
   {
     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
     FT_Memory           memory  = FT_FACE_MEMORY( face );
     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 
+    FT_UNUSED( pointer );
+
 
     return psnames->unicodes_init( memory,
                                    unicodes,
diff --git a/src/winfonts/winfnt.c b/src/winfonts/winfnt.c
index e9c1a9b5f..fd5cc4a1a 100644
--- a/src/winfonts/winfnt.c
+++ b/src/winfonts/winfnt.c
@@ -591,11 +591,14 @@
 
 
   static FT_Error
-  fnt_cmap_init( FNT_CMap  cmap )
+  fnt_cmap_init( FNT_CMap    cmap,
+                 FT_Pointer  pointer )
   {
     FNT_Face  face = (FNT_Face)FT_CMAP_FACE( cmap );
     FNT_Font  font = face->font;
 
+    FT_UNUSED( pointer );
+
 
     cmap->first = (FT_UInt32)  font->header.first_char;
     cmap->count = (FT_UInt32)( font->header.last_char - cmap->first + 1 );