diff --git a/doc/zstd_compression_format.md b/doc/zstd_compression_format.md
index 78279ce71..a2bf20cbc 100644
--- a/doc/zstd_compression_format.md
+++ b/doc/zstd_compression_format.md
@@ -1120,7 +1120,7 @@ For the purpose of counting total allocated probability points, it counts as one
 
 Symbols probabilities are read one by one, in order.
 After each probability is decoded, the total nb of probability points is updated.
-This is used to dermine how many bits must be read to decode the probability of next symbol.
+This is used to determine how many bits must be read to decode the probability of next symbol.
 
 When a symbol has a __probability__ of `zero` (decoded from reading a Value `1`),
 it is followed by a 2-bits repeat flag.
diff --git a/lib/compress/hist.h b/lib/compress/hist.h
index e6e39d348..bea2a9ebf 100644
--- a/lib/compress/hist.h
+++ b/lib/compress/hist.h
@@ -75,7 +75,7 @@ unsigned HIST_count_simple(unsigned* count, unsigned* maxSymbolValuePtr,
                            const void* src, size_t srcSize);
 
 /*! HIST_add() :
- *  Lowest level: just add nb of occurences of characters from @src into @count.
+ *  Lowest level: just add nb of occurrences of characters from @src into @count.
  *  @count is not reset. @count array is presumed large enough (i.e. 1 KB).
  @  This function does not need any additional stack memory.
  */