diff --git a/_imagingcms.c b/_imagingcms.c
index a05e5cdc6..830a03721 100644
--- a/_imagingcms.c
+++ b/_imagingcms.c
@@ -729,7 +729,7 @@ static cmsBool _calculate_rgb_primaries(CmsProfileObject* self, cmsCIEXYZTRIPLE*
 
     /* http://littlecms2.blogspot.com/2009/07/less-is-more.html */
 
-    // double array of RGB values with max on each identitiy
+    // double array of RGB values with max on each identity
     hXYZ = cmsCreateXYZProfile();
     if (hXYZ == NULL)
         return 0;
diff --git a/decode.c b/decode.c
index 7bb88d94e..482449c85 100644
--- a/decode.c
+++ b/decode.c
@@ -204,7 +204,7 @@ _setimage(ImagingDecoderObject* decoder, PyObject* args)
             }
             state->bytes = (state->bits * state->xsize+7)/8;
         }
-        /* malloc check ok, oveflow checked above */
+        /* malloc check ok, overflow checked above */
         state->buffer = (UINT8*) malloc(state->bytes);
         if (!state->buffer)
             return PyErr_NoMemory();
@@ -233,7 +233,7 @@ _setfd(ImagingDecoderObject* decoder, PyObject* args)
 
     Py_XINCREF(fd);
     state->fd = fd;
-    
+
     Py_INCREF(Py_None);
     return Py_None;
 }
@@ -874,7 +874,7 @@ PyImaging_Jpeg2KDecoderNew(PyObject* self, PyObject* args)
     decoder->cleanup = ImagingJpeg2KDecodeCleanup;
 
     context = (JPEG2KDECODESTATE *)decoder->state.context;
-    
+
     context->fd = fd;
     context->length = (off_t)length;
     context->format = codec_format;
diff --git a/libImaging/QuantOctree.c b/libImaging/QuantOctree.c
index ede3ad634..e18ab3c65 100644
--- a/libImaging/QuantOctree.c
+++ b/libImaging/QuantOctree.c
@@ -311,7 +311,7 @@ static Pixel *
 create_palette_array(const ColorBucket palette, unsigned int paletteLength) {
    Pixel *paletteArray;
    unsigned int i;
-   
+
    /* malloc check ok, calloc for overflow */
    paletteArray = calloc(paletteLength, sizeof(Pixel));
    if (!paletteArray) return NULL;
@@ -407,7 +407,7 @@ int quantize_octree(Pixel *pixelData,
    /* remove the used fine colors from the coarse cube */
    subtract_color_buckets(coarseCube, paletteBucketsFine, nFineColors);
 
-   /* did the substraction cleared one or more coarse bucket? */
+   /* did the subtraction cleared one or more coarse bucket? */
    while (nCoarseColors > count_used_color_buckets(coarseCube)) {
       /* then we can use the free buckets for fine colors */
       nAlreadySubtracted = nFineColors;