diff --git a/src/pulsecore/macro.h b/src/pulsecore/macro.h
index 215c5c026..e0381cf70 100644
--- a/src/pulsecore/macro.h
+++ b/src/pulsecore/macro.h
@@ -25,6 +25,7 @@
 ***/
 
 #include <sys/types.h>
+#include <assert.h>
 #include <pulsecore/log.h>
 
 static inline size_t pa_align(size_t l) {