diff --git a/libscpi/inc/scpi/config.h b/libscpi/inc/scpi/config.h
index 85cd07f4..94bf67d7 100644
--- a/libscpi/inc/scpi/config.h
+++ b/libscpi/inc/scpi/config.h
@@ -199,8 +199,10 @@ extern "C" {
 /* PIC32mx */
 #if defined(__C32__)
 #define HAVE_STRNLEN            0
-#define HAVE_STRNCASECMP        1
+#define HAVE_STRNCASECMP        0
 #define HAVE_STRNICMP           0
+#define isfinite                finite
+#define signbit(x)              ((x)<0)
 #endif
 
 /* AVR libc */
diff --git a/libscpi/src/error.c b/libscpi/src/error.c
index bc370a91..fedf7952 100644
--- a/libscpi/src/error.c
+++ b/libscpi/src/error.c
@@ -134,7 +134,7 @@ static scpi_bool_t SCPI_ErrorAddInternal(scpi_t * context, int16_t err, char * i
 struct error_reg {
     int16_t from;
     int16_t to;
-    scpi_reg_val_t bit;
+    scpi_reg_val_t esrBit;
 };
 
 #define ERROR_DEFS_N 9
@@ -170,7 +170,7 @@ void SCPI_ErrorPushEx(scpi_t * context, int16_t err, char * info) {
 
     for (i = 0; i < ERROR_DEFS_N; i++) {
         if ((err <= errs[i].from) && (err >= errs[i].to)) {
-            SCPI_RegSetBits(context, SCPI_REG_ESR, errs[i].bit);
+            SCPI_RegSetBits(context, SCPI_REG_ESR, errs[i].esrBit);
         }
     }