diff --git a/include/mimalloc-types.h b/include/mimalloc-types.h
index 6fa8281..686b02d 100644
--- a/include/mimalloc-types.h
+++ b/include/mimalloc-types.h
@@ -19,7 +19,7 @@ terms of the MIT license. A copy of the license can be found in the file
 // Define NDEBUG in the release version to disable assertions.
 // #define NDEBUG
 
-// Define MI_STAT as 1 to maintain statistics; set it to 2 to have detailed statitistics (but costs some performance).
+// Define MI_STAT as 1 to maintain statistics; set it to 2 to have detailed statistics (but costs some performance).
 // #define MI_STAT 1
 
 // Define MI_SECURE as 1 to encode free lists
diff --git a/src/alloc-aligned.c b/src/alloc-aligned.c
index e650080..325158f 100644
--- a/src/alloc-aligned.c
+++ b/src/alloc-aligned.c
@@ -103,7 +103,7 @@ static void* mi_realloc_zero_aligned_at(void* p, size_t newsize, size_t alignmen
         memset((uint8_t*)newp + start, 0, newsize - start);
       }
       memcpy(newp, p, (newsize > size ? size : newsize));
-      mi_free(p); // only free if succesfull
+      mi_free(p); // only free if successful
     }
     return newp;
   }
diff --git a/src/alloc.c b/src/alloc.c
index 910fa76..cc10ab8 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -337,7 +337,7 @@ void* _mi_realloc_zero(void* p, size_t newsize, bool zero) {
       memset((uint8_t*)newp + start, 0, newsize - start);
     }
     memcpy(newp, p, (newsize > size ? size : newsize));
-    mi_free(p); // only free if succesfull
+    mi_free(p); // only free if successful
   }
   return newp;
 }