diff --git a/cucul/import.c b/cucul/import.c
index 0502839..ef1a960 100644
--- a/cucul/import.c
+++ b/cucul/import.c
@@ -222,9 +222,9 @@ char const * const * cucul_get_import_list(void)
 static ssize_t import_caca(cucul_canvas_t *cv, void const *data, size_t size)
 {
     uint8_t const *buf = (uint8_t const *)data;
-    unsigned int control_size, data_size, expected_size, frames, f, n;
+    size_t control_size, data_size, expected_size;
+    unsigned int frames, f, n, offset;
     uint16_t version, flags;
-    unsigned int offset;
     int32_t xmin = 0, ymin = 0, xmax = 0, ymax = 0;
 
     if(size < 20)
@@ -247,8 +247,8 @@ static ssize_t import_caca(cucul_canvas_t *cv, void const *data, size_t size)
 
     if(control_size < 16 + frames * 32)
     {
-        debug("caca import error: control size %lu < expected %lu",
-              (unsigned long int)control_size, 16 + frames * 32);
+        debug("caca import error: control size %u < expected %u",
+              (unsigned int)control_size, 16 + frames * 32);
         goto invalid_caca;
     }
 
@@ -279,8 +279,8 @@ static ssize_t import_caca(cucul_canvas_t *cv, void const *data, size_t size)
 
     if(expected_size != data_size)
     {
-        debug("caca import error: data size %lu < expected %lu",
-              (unsigned long int)data_size, (unsigned long int)expected_size);
+        debug("caca import error: data size %u < expected %u",
+              (unsigned int)data_size, (unsigned int)expected_size);
         goto invalid_caca;
     }
 
diff --git a/cucul/triangle.c b/cucul/triangle.c
index 6880556..d08f7db 100644
--- a/cucul/triangle.c
+++ b/cucul/triangle.c
@@ -90,7 +90,7 @@ int cucul_fill_triangle(cucul_canvas_t *cv, int x1, int y1, int x2, int y2,
                         int x3, int y3, uint32_t ch)
 {
     int x, y, xmin, xmax, ymin, ymax;
-    long int xx1, xx2, xa, xb, sl21, sl31, sl32;
+    int xx1, xx2, xa, xb, sl21, sl31, sl32;
 
     /* Bubble-sort y1 <= y2 <= y3 */
     if(y1 > y2)
@@ -109,7 +109,7 @@ int cucul_fill_triangle(cucul_canvas_t *cv, int x1, int y1, int x2, int y2,
     x3 *= 0x10000;
 
     ymin = y1 < 0 ? 0 : y1;
-    ymax = y3 + 1 < (int)cv->height ? y3 + 1 : (int)cv->height;
+    ymax = y3 + 1 < cv->height ? y3 + 1 : cv->height;
 
     if(ymin < y2)
     {
@@ -143,7 +143,7 @@ int cucul_fill_triangle(cucul_canvas_t *cv, int x1, int y1, int x2, int y2,
         }
 
         xmin = xx1 < 0 ? 0 : xx1;
-        xmax = xx2 + 1 < (int)cv->width ? xx2 + 1 : (int)cv->width;
+        xmax = xx2 + 1 < cv->width ? xx2 + 1 : cv->width;
 
         for(x = xmin; x < xmax; x++)
             cucul_put_char(cv, x, y, ch);
diff --git a/cxx/cucul++.cpp b/cxx/cucul++.cpp
index eed6f94..ae39b39 100644
--- a/cxx/cucul++.cpp
+++ b/cxx/cucul++.cpp
@@ -279,7 +279,7 @@ char const *const * Cucul::getImportList(void)
     return cucul_get_import_list();
 }
 
-long int Cucul::importMemory(void const *buf, unsigned long int len, char const *fmt)
+long int Cucul::importMemory(void const *buf, size_t len, char const *fmt)
 {
     return cucul_import_memory(cv, buf, len, fmt);
 }
@@ -294,7 +294,7 @@ char const *const * Cucul::getExportList(void)
     return cucul_get_export_list();
 }
 
-void *Cucul::exportMemory(char const *fmt, unsigned long int *len)
+void *Cucul::exportMemory(char const *fmt, size_t *len)
 {
     return cucul_export_memory(cv, fmt, len);
 }
@@ -308,7 +308,7 @@ Dither::~Dither()
     cucul_free_dither(dither);
 }
 
-void Dither::setPalette(unsigned int r[], unsigned int g[], unsigned int b[], unsigned int a[])
+void Dither::setPalette(uint32_t r[], uint32_t g[], uint32_t b[], uint32_t a[])
 {
     cucul_set_dither_palette(dither, r, g, b, a);
 }
diff --git a/cxx/cucul++.h b/cxx/cucul++.h
index 309c1a7..0dfb96f 100644
--- a/cxx/cucul++.h
+++ b/cxx/cucul++.h
@@ -68,8 +68,8 @@ __class Dither
            unsigned int, unsigned int, unsigned int, unsigned int);
     ~Dither();
 
-    void setPalette(unsigned int r[], unsigned int g[],
-                    unsigned int b[], unsigned int a[]);
+    void setPalette(uint32_t r[], uint32_t g[],
+                    uint32_t b[], uint32_t a[]);
     void setBrightness(float);
     void setGamma(float);
     void setContrast(float);
@@ -136,13 +136,14 @@ __class Cucul
     int freeFrame(unsigned int);
 
     char const * const * getImportList(void);
-    long int importMemory(void const *, unsigned long int, char const *);
+    long int importMemory(void const *, size_t, char const *);
     long int importFile(char const *, char const *);
     char const * const * getExportList(void);
-    void *exportMemory(char const *, unsigned long int *);
+    void *exportMemory(char const *, size_t *);
 
     static int Rand(int, int);
     static char const * getVersion();
+
  protected:
     cucul_canvas_t *get_cucul_canvas_t();
 
diff --git a/examples/export.c b/examples/export.c
index f5e6afc..ac6b870 100644
--- a/examples/export.c
+++ b/examples/export.c
@@ -34,7 +34,7 @@ int main(int argc, char *argv[])
     void *buffer;
     char *file, *format;
     char const * const * exports, * const * p;
-    unsigned long int len;
+    size_t len;
     int x, y;
 
     exports = cucul_get_export_list();
diff --git a/examples/figfont.c b/examples/figfont.c
index e143dd1..f49e775 100644
--- a/examples/figfont.c
+++ b/examples/figfont.c
@@ -25,7 +25,7 @@ int main(int argc, char *argv[])
 {
     cucul_canvas_t *cv;
     void *buffer;
-    unsigned long int len;
+    size_t len;
     uint8_t color = 0;
 
     if(argc < 3)
diff --git a/examples/spritedit.c b/examples/spritedit.c
index 28d829a..fba3180 100644
--- a/examples/spritedit.c
+++ b/examples/spritedit.c
@@ -49,7 +49,7 @@ char *guy[] = {
 int main(int argc, char **argv)
 {
     cucul_canvas_t *sprite;
-    unsigned long int len;
+    size_t len;
     void *buffer;
     int i;
 
diff --git a/src/cacaserver.c b/src/cacaserver.c
index ffe3de9..7deec73 100644
--- a/src/cacaserver.c
+++ b/src/cacaserver.c
@@ -112,7 +112,7 @@ struct server
 
     cucul_canvas_t *canvas;
     void *buffer;
-    unsigned long int buflen;
+    size_t buflen;
 
     int client_count;
     struct client *clients;
@@ -222,8 +222,7 @@ restart:
 
         for(;;)
         {
-            long int needed;
-            ssize_t wanted;
+            ssize_t needed, wanted;
 
             needed = cucul_import_memory(server->canvas, server->input,
                                          server->read, "caca");
@@ -243,7 +242,7 @@ restart:
                 goto restart;
             server->read += wanted;
         }
-            
+
         /* Free the previous export buffer, if any */
         if(server->buffer)
         {
diff --git a/src/img2txt.c b/src/img2txt.c
index cc3dc0f..057c72f 100644
--- a/src/img2txt.c
+++ b/src/img2txt.c
@@ -95,7 +95,7 @@ int main(int argc, char **argv)
     /* libcucul context */
     cucul_canvas_t *cv;
     void *export;
-    unsigned long int len;
+    size_t len;
     struct image *i;
     unsigned int cols = 0, lines = 0, font_width = 6, font_height = 10;
     char *format = NULL;