diff --git a/src/include/nodes/memnodes.h b/src/include/nodes/memnodes.h
index 5807ef805bd..f8a78095eb9 100644
--- a/src/include/nodes/memnodes.h
+++ b/src/include/nodes/memnodes.h
@@ -120,7 +120,7 @@ typedef struct MemoryContextData
 
 	NodeTag		type;			/* identifies exact kind of context */
 	/* these two fields are placed here to minimize alignment wastage: */
-	bool		isReset;		/* T = no space alloced since last reset */
+	bool		isReset;		/* T = no space allocated since last reset */
 	bool		allowInCritSection; /* allow palloc in critical section */
 	Size		mem_allocated;	/* track memory allocated for this context */
 	const MemoryContextMethods *methods;	/* virtual function table */