diff --git a/qse/doc/page/awk.doc b/qse/doc/page/awk.doc
index 4215e957..e7c097c1 100644
--- a/qse/doc/page/awk.doc
+++ b/qse/doc/page/awk.doc
@@ -91,7 +91,7 @@ oops:
 @endcode
 
 Things can get simpler when you use C++ API. Note that the C++ API supports 
-just a single runtime context for each interpreter.
+1 single runtime context for each interpreter.
 
 @code
 /* c++ -o hello hello.cpp -lqseawkxx -lqseawk -lqsecmnxx -lqsecmn -lm */
diff --git a/qse/doc/page/mem.doc b/qse/doc/page/mem.doc
index d641fa78..cbd23de3 100644
--- a/qse/doc/page/mem.doc
+++ b/qse/doc/page/mem.doc
@@ -65,8 +65,8 @@ qse_fma_fini() invalidates all the pointers allocated with qse_fma_alloc().
 qse_fma_t* fma; int* ptr;
 fma = qse_fma_open (QSE_NULL, 0, sizeof(int), 10, 0); // create an allocator 
 ptr = (int*)qse_fma_alloc (fma, sizeof(int)); // allocate a block
-ptr = 20; // access the block
-qse_fma_free (fma, ptr1); // free the block
+*ptr = 20; // access the block
+qse_fma_free (fma, ptr); // free the block
 qse_fma_close (fma); // destroy the allocator
 @endcode
 
@@ -75,4 +75,12 @@ qse_fma_close (fma); // destroy the allocator
 If you want to allocate blocks quickly but don't want to resize or 
 deallocate the blocks individually, you can use #qse_pma_t.
 
+@code
+qse_pma_t* pma; int* ptr;
+pma = qse_pma_open (QSE_NULL, 0); // create an allocator 
+ptr = (int*)qse_pma_alloc (pma, sizeof(int)); // allocate a block
+*ptr = 20; // access the block
+qse_pma_close (pma); // destroy the allocator
+@endcode
+
 */