diff --git a/include/jemalloc/jemalloc_protos.h.in b/include/jemalloc/jemalloc_protos.h.in
index 05fc056f..a78414b1 100644
--- a/include/jemalloc/jemalloc_protos.h.in
+++ b/include/jemalloc/jemalloc_protos.h.in
@@ -28,10 +28,6 @@ JEMALLOC_EXPORT void JEMALLOC_NOTHROW	@je_@free(void *ptr)
 JEMALLOC_EXPORT JEMALLOC_ALLOCATOR JEMALLOC_RESTRICT_RETURN
     void JEMALLOC_NOTHROW	*@je_@mallocx(size_t size, int flags)
     JEMALLOC_ATTR(malloc) JEMALLOC_ALLOC_SIZE(1);
-#ifdef JEMALLOC_EXPERIMENTAL_SMALLOCX_API
-JEMALLOC_EXPORT JEMALLOC_ALLOCATOR JEMALLOC_RESTRICT_RETURN
-     smallocx_return_t JEMALLOC_NOTHROW @je_@smallocx(size_t size, int flags);
-#endif
 JEMALLOC_EXPORT JEMALLOC_ALLOCATOR JEMALLOC_RESTRICT_RETURN
     void JEMALLOC_NOTHROW	*@je_@rallocx(void *ptr, size_t size,
     int flags) JEMALLOC_ALLOC_SIZE(2);
diff --git a/include/jemalloc/jemalloc_typedefs.h.in b/include/jemalloc/jemalloc_typedefs.h.in
index fe0d7d1e..1a588743 100644
--- a/include/jemalloc/jemalloc_typedefs.h.in
+++ b/include/jemalloc/jemalloc_typedefs.h.in
@@ -75,10 +75,3 @@ struct extent_hooks_s {
 	extent_split_t		*split;
 	extent_merge_t		*merge;
 };
-
-#ifdef JEMALLOC_EXPERIMENTAL_SMALLOCX_API
-typedef struct {
-	void *ptr;
-	size_t size;
-} smallocx_return_t;
-#endif
diff --git a/src/jemalloc.c b/src/jemalloc.c
index 01e2db97..57d9f157 100644
--- a/src/jemalloc.c
+++ b/src/jemalloc.c
@@ -2770,6 +2770,11 @@ int __posix_memalign(void** r, size_t a, size_t s) PREALIAS(je_posix_memalign);
  */
 
 #ifdef JEMALLOC_EXPERIMENTAL_SMALLOCX_API
+typedef struct {
+	void *ptr;
+	size_t size;
+} smallocx_return_t;
+
 JEMALLOC_EXPORT JEMALLOC_ALLOCATOR JEMALLOC_RESTRICT_RETURN
 smallocx_return_t JEMALLOC_NOTHROW
 /*
diff --git a/test/integration/smallocx.c b/test/integration/smallocx.c
index 376fec25..f49ec845 100644
--- a/test/integration/smallocx.c
+++ b/test/integration/smallocx.c
@@ -1,5 +1,12 @@
 #include "test/jemalloc_test.h"
 
+typedef struct {
+	void *ptr;
+	size_t size;
+} smallocx_return_t;
+
+extern smallocx_return_t smallocx(size_t size, int flags);
+
 static unsigned
 get_nsizes_impl(const char *cmd) {
 	unsigned ret;