diff --git a/ChangeLog b/ChangeLog
index 7f3dbce..cf04444 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -100,6 +100,8 @@ it was reported not to on other systems, causing the tests to fail.
 25. In the RunTest script, make the test for stack setting use the same value
 for the stack as it needs for -bigstack.
 
+26. Insert a cast in pcre2_dfa_match.c to suppress a compiler warning.
+
 
 Version 10.32 10-September-2018
 -------------------------------
diff --git a/src/pcre2_dfa_match.c b/src/pcre2_dfa_match.c
index e724aeb..3f7d04e 100644
--- a/src/pcre2_dfa_match.c
+++ b/src/pcre2_dfa_match.c
@@ -426,7 +426,7 @@ else
   uint32_t newsizeK = newsize/(1024/sizeof(int));
 
   if (newsizeK + mb->heap_used > mb->heap_limit)
-    newsizeK = mb->heap_limit - mb->heap_used;
+    newsizeK = (uint32_t)(mb->heap_limit - mb->heap_used);
   newsize = newsizeK*(1024/sizeof(int));
 
   if (newsize < RWS_RSIZE + ovecsize + RWS_ANCHOR_SIZE)