diff --git a/tools/Makefile b/tools/Makefile
index 4f926f192..0b0e62e2f 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -108,11 +108,13 @@ irstlm/Makefile: irstlm/.patched
 
 irstlm/.patched: | irstlm
 		-cd irstlm;\
-		patch --verbose -N -p0 < ../interpolatedwrite-5.60.02.patch
+		patch --verbose -N -p0 < ../interpolatedwrite-5.60.02.patch; \
+		patch --verbose -N -p0 < ../irstlm.patch; \
+		mv configure.in configure.ac
 		touch $@ 		
 
 irstlm:
-		svn -r 398 co https://svn.code.sf.net/p/irstlm/code/trunk irstlm
+		svn -r 398 co --non-interactive --trust-server-cert https://svn.code.sf.net/p/irstlm/code/trunk irstlm
 
 atlas: ATLAS/include/cblas.h
 
diff --git a/tools/irstlm.patch b/tools/irstlm.patch
new file mode 100644
index 000000000..9a0450ea9
--- /dev/null
+++ b/tools/irstlm.patch
@@ -0,0 +1,39 @@
+--- src/mdiadapt.cpp	2014-03-05 00:43:33.000000000 -0800
++++ src/mdiadapt.cpp.new	2014-03-05 00:42:41.000000000 -0800
+@@ -20,6 +20,7 @@
+ 
+ #include <cmath>
+ #include <string>
++#include <vector>
+ #include <assert.h>
+ #include "mfstream.h"
+ #include "mempool.h"
+@@ -1112,7 +1113,7 @@
+ 	}else{
+ 		cerr << "savebin: " << filename << "\n";		
+ 	}
+-  streampos pos[lmsize()+1];
++  vector<streampos> pos(lmsize()+1);
+   int num[lmsize()+1];
+ 	
+ 	int maxlev=lmsize();
+@@ -1303,7 +1304,7 @@
+   fstream out(filename,ios::out);
+ 	//  out.precision(15);  
+ 	
+-  streampos pos[lmsize()+1];
++  vector<streampos> pos(lmsize()+1);
+   int num[lmsize()+1];
+   char buff[100];
+ 
+--- src/interpolate-lm.cpp	2014-03-05 00:43:37.000000000 -0800
++++ src/interpolate-lm.cpp.new	2014-03-05 00:43:01.000000000 -0800
+@@ -258,7 +258,7 @@
+   //Learning mixture weights
+   if (learn){
+ 	
+-    std::vector<float> p[N]; //LM probabilities
++    std::vector< std::vector<float> > p(N); //LM probabilities
+     float c[N]; //expected counts
+     float den,norm; //inner denominator, normalization term
+     float variation=1.0; // global variation between new old params