diff --git a/main/config.w32.h.in b/main/config.w32.h.in
index 5214cd87c1e..ffb7d88c9a8 100644
--- a/main/config.w32.h.in
+++ b/main/config.w32.h.in
@@ -162,4 +162,4 @@
 #define HAVE_STRFTIME 1
 #define SIZEOF_INT 4
 #define HAVE_GLOB
-#define SHLIB_SUFFIX_NAME "dll"
+#define PHP_SHLIB_SUFFIX "dll"