diff --git a/src/pulsecore/authkey-prop.c b/src/pulsecore/authkey-prop.c
index 3b8304b23..146d7ca06 100644
--- a/src/pulsecore/authkey-prop.c
+++ b/src/pulsecore/authkey-prop.c
@@ -21,6 +21,10 @@
   USA.
 ***/
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <assert.h>
 #include <string.h>
 
diff --git a/src/pulsecore/props.c b/src/pulsecore/props.c
index 4a39f0fb9..37e741941 100644
--- a/src/pulsecore/props.c
+++ b/src/pulsecore/props.c
@@ -21,6 +21,10 @@
   USA.
 ***/
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <assert.h>
 
 #include <pulse/xmalloc.h>
diff --git a/src/pulsecore/x11wrap.c b/src/pulsecore/x11wrap.c
index 067b7df06..1bcbcd48a 100644
--- a/src/pulsecore/x11wrap.c
+++ b/src/pulsecore/x11wrap.c
@@ -21,6 +21,10 @@
   USA.
 ***/
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <assert.h>
 #include <stdio.h>