diff --git a/src/grib_bits_any_endian.c b/src/grib_bits_any_endian.c
index 362f11fe2..411d902bc 100644
--- a/src/grib_bits_any_endian.c
+++ b/src/grib_bits_any_endian.c
@@ -97,7 +97,7 @@ int grib_encode_string(unsigned char* bitStream, long* bitOffset, size_t numberO
     int remainder   = *bitOffset % 8;
     unsigned char c;
     unsigned char* p;
-    unsigned char mask[]    = { 0, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
+    const unsigned char mask[]    = { 0, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
     int remainderComplement = 8 - remainder;
     char str[512]           = {0,};
     char* s = str;
diff --git a/src/grib_bits_fast_big_endian.c b/src/grib_bits_fast_big_endian.c
index 4a50349dc..b47dcfcc7 100644
--- a/src/grib_bits_fast_big_endian.c
+++ b/src/grib_bits_fast_big_endian.c
@@ -90,7 +90,7 @@ char* grib_decode_string(const unsigned char* bitStream, long* bitOffset, size_t
     unsigned char c;
     unsigned char* p;
     char* s                 = string;
-    unsigned char mask[]    = { 0, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
+    const unsigned char mask[]    = { 0, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
     int remainderComplement = 8 - remainder;
 
     if (numberOfCharacters == 0)
diff --git a/src/grib_iterator_class_lambert_azimuthal_equal_area.c b/src/grib_iterator_class_lambert_azimuthal_equal_area.c
index 0ba3be713..f105094ae 100644
--- a/src/grib_iterator_class_lambert_azimuthal_equal_area.c
+++ b/src/grib_iterator_class_lambert_azimuthal_equal_area.c
@@ -131,7 +131,7 @@ static void pj_authset(double es, double* APA)
     APA[1] += t * P11;
     APA[2] = t * P20;
 }
-static double pj_authlat(double beta, double* APA)
+static double pj_authlat(double beta, const double* APA)
 {
     double t = beta + beta;
     return (beta + APA[0] * sin(t) + APA[1] * sin(t + t) + APA[2] * sin(t + t + t));