diff --git a/changes/bug4059 b/changes/bug4059
new file mode 100644
index 0000000000..82a4b1a10c
--- /dev/null
+++ b/changes/bug4059
@@ -0,0 +1,5 @@
+  o Minor bugfixes:
+    - Change an integer overflow check in the OpenBSD_Malloc code so
+      that GCC is less likely to eliminate it as impossible. Patch
+      from Mansour Moufid. Fixes bug 4059.
+
diff --git a/src/common/OpenBSD_malloc_Linux.c b/src/common/OpenBSD_malloc_Linux.c
index 19dac77657..445135c6bb 100644
--- a/src/common/OpenBSD_malloc_Linux.c
+++ b/src/common/OpenBSD_malloc_Linux.c
@@ -1236,7 +1236,7 @@ imalloc(size_t size)
 		ptralloc = 1;
 		size = malloc_pagesize;
 	}
-	if ((size + malloc_pagesize) < size) {	/* Check for overflow */
+	if (size > SIZE_MAX - malloc_pagesize) { /* Check for overflow */
 		result = NULL;
 		errno = ENOMEM;
 	} else if (size <= malloc_maxsize)