diff --git a/com.oracle.truffle.r.native/fficall/src/common/coerce_fastr.c b/com.oracle.truffle.r.native/fficall/src/common/coerce_fastr.c
index dae288af88ba75f0d1793c8c3fc9e5f623ff9c8c..a49307a11779bc2093e0410ad88ebc71d4a5f449 100644
--- a/com.oracle.truffle.r.native/fficall/src/common/coerce_fastr.c
+++ b/com.oracle.truffle.r.native/fficall/src/common/coerce_fastr.c
@@ -6,7 +6,7 @@
  * Copyright (c) 1995, 1996, 1997  Robert Gentleman and Ross Ihaka
  * Copyright (c) 1995-2014, The R Core Team
  * Copyright (c) 2002-2008, The R Foundation
- * Copyright (c) 2015, Oracle and/or its affiliates
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates
  *
  * All rights reserved.
  */
@@ -55,6 +55,77 @@ RealFromInteger(int x, int *warn)
 	return x;
 }
 
+int
+IntegerFromLogical(int x, int *warn)
+{
+    return (x == NA_LOGICAL) ?
+	NA_INTEGER : x;
+}
+
+int
+IntegerFromReal(double x, int *warn)
+{
+    if (ISNAN(x))
+	return NA_INTEGER;
+    else if (x > INT_MAX || x <= INT_MIN ) {
+	*warn |= WARN_NA;
+	return NA_INTEGER;
+    }
+    return (int) x;
+}
+
+static SEXP coerceToInteger(SEXP v)
+{
+    SEXP ans;
+    int warn = 0;
+    R_xlen_t i, n;
+    PROTECT(ans = allocVector(INTSXP, n = XLENGTH(v)));
+#ifdef R_MEMORY_PROFILING
+    if (RTRACE(v)){
+       memtrace_report(v,ans);
+       SET_RTRACE(ans,1);
+    }
+#endif
+    DUPLICATE_ATTRIB(ans, v);
+    switch (TYPEOF(v)) {
+    case LGLSXP:
+	for (i = 0; i < n; i++) {
+//	    if ((i+1) % NINTERRUPT == 0) R_CheckUserInterrupt();
+	    INTEGER(ans)[i] = IntegerFromLogical(LOGICAL(v)[i], &warn);
+	}
+	break;
+    case REALSXP:
+	for (i = 0; i < n; i++) {
+//	    if ((i+1) % NINTERRUPT == 0) R_CheckUserInterrupt();
+	    INTEGER(ans)[i] = IntegerFromReal(REAL(v)[i], &warn);
+	}
+	break;
+    case CPLXSXP:
+	for (i = 0; i < n; i++) {
+//	    if ((i+1) % NINTERRUPT == 0) R_CheckUserInterrupt();
+	    INTEGER(ans)[i] = IntegerFromComplex(COMPLEX(v)[i], &warn);
+	}
+	break;
+    case STRSXP:
+	for (i = 0; i < n; i++) {
+//	    if ((i+1) % NINTERRUPT == 0) R_CheckUserInterrupt();
+	    INTEGER(ans)[i] = IntegerFromString(STRING_ELT(v, i), &warn);
+	}
+	break;
+    case RAWSXP:
+	for (i = 0; i < n; i++) {
+//	    if ((i+1) % NINTERRUPT == 0) R_CheckUserInterrupt();
+	    INTEGER(ans)[i] = (int)RAW(v)[i];
+	}
+	break;
+    default:
+	UNIMPLEMENTED_TYPE("coerceToInteger", v);
+    }
+    if (warn) CoercionWarning(warn);
+    UNPROTECT(1);
+    return ans;
+}
+
 static SEXP coerceToReal(SEXP v)
 {
     SEXP ans;
diff --git a/com.oracle.truffle.r.native/fficall/src/common/inlined_fastr.c b/com.oracle.truffle.r.native/fficall/src/common/inlined_fastr.c
index 04933118b60983ec3bfdeaccc9fab2a4186ed61d..5705f851f042d575ef361630e6e61fd17de2aad1 100644
--- a/com.oracle.truffle.r.native/fficall/src/common/inlined_fastr.c
+++ b/com.oracle.truffle.r.native/fficall/src/common/inlined_fastr.c
@@ -6,7 +6,7 @@
  * Copyright (c) 1995, 1996, 1997  Robert Gentleman and Ross Ihaka
  * Copyright (c) 1995-2014, The R Core Team
  * Copyright (c) 2002-2008, The R Foundation
- * Copyright (c) 2015, Oracle and/or its affiliates
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates
  *
  * All rights reserved.
  */
@@ -540,3 +540,7 @@ INLINE_FUN SEXP R_FixupRHS(SEXP x, SEXP y)
     return y;
 }
 
+Rboolean IS_BYTES(SEXP x) { return FALSE; }
+Rboolean IS_LATIN1(SEXP x) { return FALSE; }
+Rboolean IS_ASCII(SEXP x) { return FALSE; }
+Rboolean IS_UTF8(SEXP x) { return TRUE; }