diff --git a/dlls/dmloader/debug.c b/dlls/dmloader/debug.c
index 3d8b6cc9e8c..b71376f1643 100644
--- a/dlls/dmloader/debug.c
+++ b/dlls/dmloader/debug.c
@@ -64,7 +64,7 @@ const char *debugstr_dmversion (LPDMUS_VERSION version) {
 }
 
 /* month number into month name (for debugstr_filetime) */
-const char *debugstr_month (DWORD dwMonth) {
+static const char *debugstr_month (DWORD dwMonth) {
 	switch (dwMonth) {
 		case 1: return "January";
 		case 2: return "February";
@@ -428,7 +428,7 @@ const char *debugstr_dmreturn (DWORD code) {
 
 
 /* generic flag-dumping function */
-const char* debugstr_flags (DWORD flags, const flag_info* names, size_t num_names){
+static const char* debugstr_flags (DWORD flags, const flag_info* names, size_t num_names){
 	static char buffer[128] = "", *ptr = &buffer[0];
 	unsigned int i, size = sizeof(buffer);
 		
@@ -446,7 +446,7 @@ const char* debugstr_flags (DWORD flags, const flag_info* names, size_t num_name
 }
 
 /* dump DMUS_OBJ flags */
-const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask) {
+static const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask) {
     static const flag_info flags[] = {
 	    FE(DMUS_OBJ_OBJECT),
 	    FE(DMUS_OBJ_CLASS),
@@ -465,7 +465,7 @@ const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask) {
 }
 
 /* dump DMUS_CONTAINER flags */
-const char *debugstr_DMUS_CONTAINER_FLAGS (DWORD flagmask) {
+static const char *debugstr_DMUS_CONTAINER_FLAGS (DWORD flagmask) {
     static const flag_info flags[] = {
 	    FE(DMUS_CONTAINER_NOLOADS)
 	};
@@ -473,7 +473,7 @@ const char *debugstr_DMUS_CONTAINER_FLAGS (DWORD flagmask) {
 }
 
 /* dump DMUS_CONTAINED_OBJF flags */
-const char *debugstr_DMUS_CONTAINED_OBJF_FLAGS (DWORD flagmask) {
+static const char *debugstr_DMUS_CONTAINED_OBJF_FLAGS (DWORD flagmask) {
     static const flag_info flags[] = {
 	    FE(DMUS_CONTAINED_OBJF_KEEP)
 	};
diff --git a/dlls/dmloader/debug.h b/dlls/dmloader/debug.h
index f6486a513b7..8d28cea3849 100644
--- a/dlls/dmloader/debug.h
+++ b/dlls/dmloader/debug.h
@@ -57,12 +57,7 @@ extern const char *debugstr_filetime (LPFILETIME time);
 extern const char *debugstr_dmguid (const GUID *id);
 /* returns name of given error code */
 extern const char *debugstr_dmreturn (DWORD code);
-/* generic flags-dumping function */
-extern const char *debugstr_flags (DWORD flags, const flag_info* names, size_t num_names);
 
-extern const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask);
-extern const char *debugstr_DMUS_CONTAINER_FLAGS (DWORD flagmask);
-extern const char *debugstr_DMUS_CONTAINED_OBJF_FLAGS (DWORD flagmask);
 /* dump whole DMUS_OBJECTDESC struct */
 extern const char *debugstr_DMUS_OBJECTDESC (LPDMUS_OBJECTDESC pDesc);
 extern const char *debugstr_DMUS_IO_CONTAINER_HEADER (LPDMUS_IO_CONTAINER_HEADER pHeader);