diff --git a/src/handlesegfault.c b/src/handlesegfault.c
index d57efc6..65e285e 100755
--- a/src/handlesegfault.c
+++ b/src/handlesegfault.c
@@ -4,16 +4,21 @@
 // Handling Sigfault errors. Prevents the code from exiting R.
 // This is only available for UNIX platforms.
 #ifndef WIN_COMPILE
+#ifdef HAVE_XML
 void segfault_KGML(int signal, siginfo_t *si, void *arg){
 	EVAL(lang2(install("registerMemoryErr"), mkString("KGML2igraph")));
 	error("Critical memory error in KGML2igraph. Please save your work and restart R.");
 }
+#endif
+#ifdef HAVE_SBML
 void segfault_SBML(int signal, siginfo_t *si, void *arg){
 	EVAL(lang2(install("registerMemoryErr"), mkString("SBML2igraph")));
 	error("Critical memory error in SBML2igraph. Please save your work and restart R.");
 }
 #endif
+#endif
 
+#ifdef HAVE_XML
 void handle_segfault_KGML(){
  #ifndef WIN_COMPILE
 	struct sigaction sa;
@@ -26,7 +31,9 @@ void handle_segfault_KGML(){
     sigaction(SIGSEGV, &sa, NULL);
 #endif
 }
+#endif
 
+#ifdef HAVE_SBML
 void handle_segfault_SBML(){
 #ifndef WIN_COMPILE    
 	struct sigaction sa;
@@ -39,3 +46,4 @@ void handle_segfault_SBML(){
     sigaction(SIGSEGV, &sa, NULL);
 #endif
 }
+#endif
diff --git a/src/handlesegfault.h b/src/handlesegfault.h
index 3822879..c2f7426 100755
--- a/src/handlesegfault.h
+++ b/src/handlesegfault.h
@@ -15,8 +15,12 @@
 extern "C" {
 #endif
 
+#ifdef HAVE_XML
 void handle_segfault_KGML();
+#endif
+#ifdef HAVE_SBML
 void handle_segfault_SBML();
+#endif
 
 #ifdef __cplusplus
 }