diff --git a/com.oracle.truffle.r.native/fficall/src/jni/variables.c b/com.oracle.truffle.r.native/fficall/src/jni/variables.c
index 827b2d40e819acd5581e19c4f4775ab50e5368a7..cbab66f68fde80d60e08d77d7956910c89d45001 100644
--- a/com.oracle.truffle.r.native/fficall/src/jni/variables.c
+++ b/com.oracle.truffle.r.native/fficall/src/jni/variables.c
@@ -83,11 +83,6 @@ static SEXP R_SrcrefSymbol_static;
 static SEXP R_SrcfileSymbol_static;
 static SEXP R_RestartToken_static;
 
-// logical constants
-static SEXP R_TrueValue_static;
-static SEXP R_FalseValue_static;
-static SEXP R_LogicalNAValue_static;
-
 static const char *R_Home_static;
 static const char *R_TempDir_static;
 
@@ -437,12 +432,6 @@ void init_variables(JNIEnv *env, jobjectArray initialValues) {
 					R_BlankScalarString_static = ref;
 				} else if (strcmp(nameChars, "R_NamespaceEnvSymbol") == 0) {
 					R_NamespaceEnvSymbol_static = ref;
-				} else if (strcmp(nameChars, "R_TrueValue") == 0) {
-				    R_TrueValue_static = ref;
-				} else if (strcmp(nameChars, "R_FalseValue") == 0) {
-				    R_FalseValue_static = ref;
-				} else if (strcmp(nameChars, "R_LogicalNAValue") == 0) {
-				    R_LogicalNAValue_static = ref;
 				} else {
 					char msg[128];
 					strcpy(msg, "non-null R variable not assigned: ");
diff --git a/com.oracle.truffle.r.runtime.ffi/src/com/oracle/truffle/r/runtime/ffi/RFFIVariables.java b/com.oracle.truffle.r.runtime.ffi/src/com/oracle/truffle/r/runtime/ffi/RFFIVariables.java
index 4b2c7df1b29c31b142ca7a553ad14e138aaf1348..be05015ada910b1c72a7a596469ba54285284f47 100644
--- a/com.oracle.truffle.r.runtime.ffi/src/com/oracle/truffle/r/runtime/ffi/RFFIVariables.java
+++ b/com.oracle.truffle.r.runtime.ffi/src/com/oracle/truffle/r/runtime/ffi/RFFIVariables.java
@@ -79,9 +79,6 @@ public enum RFFIVariables {
     R_NaInt(RRuntime.INT_NA),
     R_BlankString(CharSXPWrapper.create("")),
     R_BlankScalarString(RDataFactory.createStringVectorFromScalar("")),
-    R_TrueValue(RRuntime.LOGICAL_TRUE),
-    R_FalseValue(RRuntime.LOGICAL_FALSE),
-    R_LogicalNAValue(RRuntime.LOGICAL_NA),
     R_BaseSymbol(RDataFactory.createSymbol("base")),
     R_NamespaceEnvSymbol(RDataFactory.createSymbol(".__NAMESPACE__.")),
     R_RestartToken(null);