--- a/chafa/internal/chafa-popcnt.c
+++ b/chafa/internal/chafa-popcnt.c
@@ -23,6 +23,10 @@
 #include "chafa/chafa.h"
 #include "chafa/chafa-private.h"
 
+#if !defined(HAVE_POPCNT64_INTRINSICS) && !defined(__GLIBC__)
+typedef int __int32_t;
+#endif
+
 gint
 chafa_pop_count_u64_builtin (guint64 v)
 {