diff --git a/c/coreslam_internals.h b/c/coreslam_internals.h
new file mode 100644
index 0000000..4ac3f4c
--- /dev/null
+++ b/c/coreslam_internals.h
@@ -0,0 +1,36 @@
+/*
+ziggurat.h Ziggurat random-number generator
+
+Downloaded from 
+
+  http://people.sc.fsu.edu/~jburkardt/c_src/ziggurat/ziggurat.c
+
+on 20 July 2014.
+
+This code is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as 
+published by the Free Software Foundation, either version 3 of the 
+License, or (at your option) any later version.
+
+This code is distributed in the hope that it will be useful,     
+but WITHOUT ANY WARRANTY without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License 
+along with this code.  If not, see <http:#www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+
+uint32_t cong_seeded ( uint32_t *jcong );
+double cpu_time ( void );
+uint32_t kiss_seeded ( uint32_t *jcong, uint32_t *jsr, uint32_t *w, uint32_t *z );
+uint32_t mwc_seeded ( uint32_t *w, uint32_t *z );
+float r4_exp ( uint32_t *jsr, uint32_t ke[256], float fe[256], float we[256] );
+void r4_exp_setup ( uint32_t ke[256], float fe[256], float we[256] );
+float r4_nor ( uint32_t *jsr, uint32_t kn[128], float fn[128], float wn[128] );
+void r4_nor_setup ( uint32_t kn[128], float fn[128], float wn[128] );
+float r4_uni ( uint32_t *jsr );
+uint32_t shr3_seeded ( uint32_t *jsr );
+void timestamp ( void );