diff --git a/src/libsysprof/preload/meson.build b/src/libsysprof/preload/meson.build
index dd237a3a..6906ec7e 100644
--- a/src/libsysprof/preload/meson.build
+++ b/src/libsysprof/preload/meson.build
@@ -1,6 +1,7 @@
 libdl_dep = cc.find_library('dl', required: false)
 
 preload_deps = [
+  dependency('glib-2.0'),
   libsysprof_capture_dep,
   libdl_dep,
 ]
diff --git a/src/libsysprof/preload/sysprof-memory-collector.c b/src/libsysprof/preload/sysprof-memory-collector.c
index 30591c88..dd851ac9 100644
--- a/src/libsysprof/preload/sysprof-memory-collector.c
+++ b/src/libsysprof/preload/sysprof-memory-collector.c
@@ -23,6 +23,7 @@
 #include "config.h"
 
 #include <dlfcn.h>
+#include <glib.h>
 #include <sched.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
diff --git a/src/libsysprof/preload/sysprof-speedtrack-collector.c b/src/libsysprof/preload/sysprof-speedtrack-collector.c
index 6b2b08c0..223dea91 100644
--- a/src/libsysprof/preload/sysprof-speedtrack-collector.c
+++ b/src/libsysprof/preload/sysprof-speedtrack-collector.c
@@ -24,6 +24,7 @@
 
 #include <dlfcn.h>
 #include <fcntl.h>
+#include <glib.h>
 #include <stdlib.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
diff --git a/src/libsysprof/sysprof-kernel-symbol.h b/src/libsysprof/sysprof-kernel-symbol.h
index 7ef72f01..27c4790a 100644
--- a/src/libsysprof/sysprof-kernel-symbol.h
+++ b/src/libsysprof/sysprof-kernel-symbol.h
@@ -24,6 +24,8 @@
 # error "Only <sysprof.h> can be included directly."
 #endif
 
+#include <glib.h>
+
 #include "sysprof-capture-types.h"
 
 G_BEGIN_DECLS
diff --git a/src/libsysprof/sysprof-map-lookaside.c b/src/libsysprof/sysprof-map-lookaside.c
index b1532e2b..277e7f66 100644
--- a/src/libsysprof/sysprof-map-lookaside.c
+++ b/src/libsysprof/sysprof-map-lookaside.c
@@ -20,6 +20,8 @@
 
 #include "config.h"
 
+#include <glib.h>
+
 #include "sysprof-map-lookaside.h"
 
 struct _SysprofMapLookaside
diff --git a/src/libsysprof/sysprof-map-lookaside.h b/src/libsysprof/sysprof-map-lookaside.h
index e517a600..ef068562 100644
--- a/src/libsysprof/sysprof-map-lookaside.h
+++ b/src/libsysprof/sysprof-map-lookaside.h
@@ -20,6 +20,8 @@
 
 #pragma once
 
+#include <glib.h>
+
 #include "sysprof-capture-types.h"
 
 G_BEGIN_DECLS
diff --git a/src/libsysprof/sysprof-source.h b/src/libsysprof/sysprof-source.h
index 62e2f53c..412aa765 100644
--- a/src/libsysprof/sysprof-source.h
+++ b/src/libsysprof/sysprof-source.h
@@ -24,6 +24,7 @@
 # error "Only <sysprof.h> can be included directly."
 #endif
 
+#include <glib.h>
 #include <gio/gio.h>
 #include <sysprof-capture.h>