--- a/libmng_jpeg.c	2012-07-29 21:26:34.000000000 +0200
+++ b/libmng_jpeg.c	2016-04-01 12:42:16.196127825 +0200
@@ -66,6 +66,7 @@
 #include "libmng_memory.h"
 #include "libmng_pixels.h"
 #include "libmng_jpeg.h"
+#include <stdbool.h>
 
 #if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
 #pragma option -A                      /* force ANSI-C */
@@ -105,7 +106,7 @@
 boolean mng_fill_input_buffer (j_decompress_ptr cinfo)
 #endif
 {
-  return FALSE;                        /* force IJG routine to return to caller */
+  return false;                        /* force IJG routine to return to caller */
 }
 #endif /* MNG_INCLUDE_JNG_READ */
 
@@ -533,7 +534,7 @@
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
 #endif
-      if (jpeg_read_header (pData->pJPEGdinfo, TRUE) != JPEG_SUSPENDED)
+      if (jpeg_read_header (pData->pJPEGdinfo, true) != JPEG_SUSPENDED)
       {                                /* indicate the header's oke */
         pData->bJPEGhasheader = MNG_TRUE;
                                        /* let's do some sanity checks ! */
@@ -577,13 +578,13 @@
       /* set parameters for decompression */
 
       if (pData->bJPEGprogressive)     /* progressive display ? */
-        pData->pJPEGdinfo->buffered_image = TRUE;
+        pData->pJPEGdinfo->buffered_image = true;
 
       /* jpeg_start_decompress(...); */
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
 #endif
-      if (jpeg_start_decompress (pData->pJPEGdinfo) == TRUE)
+      if (jpeg_start_decompress (pData->pJPEGdinfo) == true)
                                        /* indicate it started */
         pData->bJPEGdecostarted = MNG_TRUE;
 
@@ -680,7 +681,7 @@
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
 #endif
-      if (jpeg_finish_decompress (pData->pJPEGdinfo) == TRUE)
+      if (jpeg_finish_decompress (pData->pJPEGdinfo) == true)
       {                                /* indicate it's done */
         pData->bJPEGhasheader   = MNG_FALSE;
         pData->bJPEGdecostarted = MNG_FALSE;
@@ -887,7 +888,7 @@
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
 #endif
-      if (jpeg_read_header (pData->pJPEGdinfo2, TRUE) != JPEG_SUSPENDED)
+      if (jpeg_read_header (pData->pJPEGdinfo2, true) != JPEG_SUSPENDED)
       {                                /* indicate the header's oke */
         pData->bJPEGhasheader2 = MNG_TRUE;
                                        /* let's do some sanity checks ! */
@@ -922,13 +923,13 @@
       /* set parameters for decompression */
 
       if (pData->bJPEGprogressive2)    /* progressive display ? */
-        pData->pJPEGdinfo2->buffered_image = TRUE;
+        pData->pJPEGdinfo2->buffered_image = true;
 
       /* jpeg_start_decompress(...); */
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
 #endif
-      if (jpeg_start_decompress (pData->pJPEGdinfo2) == TRUE)
+      if (jpeg_start_decompress (pData->pJPEGdinfo2) == true)
                                        /* indicate it started */
         pData->bJPEGdecostarted2 = MNG_TRUE;
 
@@ -1017,7 +1018,7 @@
 #ifdef MNG_SUPPORT_TRACE
       MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
 #endif
-      if (jpeg_finish_decompress (pData->pJPEGdinfo2) == TRUE)
+      if (jpeg_finish_decompress (pData->pJPEGdinfo2) == true)
       {                                /* indicate it's done */
         pData->bJPEGhasheader2   = MNG_FALSE;
         pData->bJPEGdecostarted2 = MNG_FALSE;