diff --git a/apps/filetypes.c b/apps/filetypes.c
index 49196d40ed..b765e7a3b0 100644
--- a/apps/filetypes.c
+++ b/apps/filetypes.c
@@ -344,7 +344,7 @@ void  filetype_init(void)
 
     strdup_bufsize = filesize(fd);
     strdup_handle = core_alloc_ex("filetypes", strdup_bufsize, &ops);
-    if (strdup_handle < 0)
+    if (strdup_handle <= 0)
     {
         close(fd);
         return;
diff --git a/apps/gui/icon.c b/apps/gui/icon.c
index 46da38b765..f37cee969c 100644
--- a/apps/gui/icon.c
+++ b/apps/gui/icon.c
@@ -197,7 +197,7 @@ static void load_icons(const char* filename, enum Iconset iconset,
         size_t buf_size = read_bmp_fd(fd, &ic->bmp, 0, 
                                         bmpformat|FORMAT_RETURN_SIZE, NULL);
         ic->handle = core_alloc_ex(filename, buf_size, &buflib_ops);
-        if (ic->handle < 0)
+        if (ic->handle <= 0)
         {
             close(fd);
             return;
diff --git a/apps/gui/skin_engine/skin_backdrops.c b/apps/gui/skin_engine/skin_backdrops.c
index edb895c56f..0d3c8b605f 100644
--- a/apps/gui/skin_engine/skin_backdrops.c
+++ b/apps/gui/skin_engine/skin_backdrops.c
@@ -245,7 +245,7 @@ void skin_backdrop_load_setting(void)
                     backdrops[i].buflib_handle =
                             core_alloc_ex(global_settings.backdrop_file,
                                         LCD_BACKDROP_BYTES, &buflib_ops);
-                    if (backdrops[i].buflib_handle < 0)
+                    if (backdrops[i].buflib_handle <= 0)
                         return;
                 }
                 bool loaded;
diff --git a/apps/gui/skin_engine/skin_parser.c b/apps/gui/skin_engine/skin_parser.c
index 4784039a87..4de0aae3b2 100644
--- a/apps/gui/skin_engine/skin_parser.c
+++ b/apps/gui/skin_engine/skin_parser.c
@@ -1665,7 +1665,7 @@ static int load_skin_bmp(struct wps_data *wps_data, struct bitmap *bitmap, char*
     size_t buf_size = read_bmp_fd(fd, bitmap, 0,
                                     format|FORMAT_RETURN_SIZE, NULL);
     handle = core_alloc_ex(bitmap->data, buf_size, &buflib_ops);
-    if (handle < 0)
+    if (handle <= 0)
     {
         DEBUGF("Not enough skin buffer: need %zd more.\n",
                 buf_size - skin_buffer_freespace());
@@ -2315,7 +2315,7 @@ bool skin_data_load(enum screen_type screen, struct wps_data *wps_data,
 #ifndef __PCTOOL__
     wps_data->buflib_handle = core_alloc(isfile ? buf : "failsafe skin",
                                             skin_buffer_usage());
-    if (wps_data->buflib_handle >= 0)
+    if (wps_data->buflib_handle > 0)
     {
         wps_data->wps_loaded = true;
         memcpy(core_get_data(wps_data->buflib_handle), skin_buffer,
diff --git a/apps/scrobbler.c b/apps/scrobbler.c
index 06c957cd6c..78414f3d88 100644
--- a/apps/scrobbler.c
+++ b/apps/scrobbler.c
@@ -255,7 +255,7 @@ int scrobbler_init(void)
         return -1;
 
     scrobbler_cache = core_alloc("scrobbler", SCROBBLER_MAX_CACHE*SCROBBLER_CACHE_LEN);
-    if (scrobbler_cache < 0)
+    if (scrobbler_cache <= 0)
     {
         logf("SCROOBLER: OOM");
         return -1;
diff --git a/firmware/font.c b/firmware/font.c
index 4b21f0ffe3..06f104054f 100644
--- a/firmware/font.c
+++ b/firmware/font.c
@@ -514,7 +514,7 @@ int font_load_ex( const char *path, size_t buf_size, int glyphs )
     int handle = core_alloc_ex( path, 
                      bufsize + sizeof( struct buflib_alloc_data ), 
                      &buflibops );
-    if ( handle < 0 )
+    if ( handle <= 0 )
     {
         return -1;
     }