diff --git a/Source/exehead/components.c b/Source/exehead/components.c
index b1ef5032..45d32863 100644
--- a/Source/exehead/components.c
+++ b/Source/exehead/components.c
@@ -91,6 +91,8 @@ void NSISCALL RefreshSectionGroups() {
   _RefreshSectionGroups(0, 1);
 }
 
+#ifdef NSIS_CONFIG_COMPONENTPAGE
+
 void NSISCALL SetInstType(int inst_type) {
   unsigned int i = 0;
 
@@ -146,3 +148,5 @@ unsigned int NSISCALL GetInstType(HTREEITEM *items) {
 
   return i;
 }
+
+#endif//NSIS_CONFIG_COMPONENTPAGE
diff --git a/Source/exehead/components.h b/Source/exehead/components.h
index b5a93497..870f2acb 100644
--- a/Source/exehead/components.h
+++ b/Source/exehead/components.h
@@ -3,7 +3,9 @@
 
 void NSISCALL SectionFlagsChanged(unsigned int index);
 void NSISCALL RefreshSectionGroups();
+#ifdef NSIS_CONFIG_COMPONENTPAGE
 void NSISCALL SetInstType(int inst_type);
 unsigned int NSISCALL GetInstType(HTREEITEM *items);
+#endif//NSIS_CONFIG_COMPONENTPAGE
 
 #endif//!___COMPONENTS_H___