diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1527d6a5d00..bdf2658b080 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,7 +69,7 @@ jobs:
             compiler: clang
             run_tests: true
             meson_options: -Dbuildtype=release
-            enabled: ${{ github.event_name != 'pull_request' && needs.changes.outputs.edited == 'true' }}
+            enabled: ${{ (github.event_name != 'pull_request' || contains(github.head_ref, 'clang')) && needs.changes.outputs.edited == 'true' }}
             timeout: 45
             allow_failure: false
           - name: linux-meson-gcc-tests
diff --git a/librz/include/rz_util/rz_hex.h b/librz/include/rz_util/rz_hex.h
index b8c514588f4..faca386cc48 100644
--- a/librz/include/rz_util/rz_hex.h
+++ b/librz/include/rz_util/rz_hex.h
@@ -9,7 +9,7 @@ RZ_API int rz_hex_pair2bin(const char *arg);
 RZ_API int rz_hex_str2binmask(const char *in, ut8 *out, ut8 *mask);
 RZ_API int rz_hex_str2bin(const char *in, ut8 *out);
 RZ_API int rz_hex_bin2str(const ut8 *in, int len, char *out);
-RZ_API void rz_hex_ut2st_str(const ut64 in, RZ_INOUT char *out, const int len);
+RZ_API void rz_hex_ut2st_str(const ut32 in, RZ_INOUT char *out, const int len);
 RZ_API char *rz_hex_bin2strdup(const ut8 *in, int len);
 RZ_API bool rz_hex_to_byte(ut8 *val, ut8 c);
 RZ_API int rz_hex_str_is_valid(const char *s);
diff --git a/librz/util/hex.c b/librz/util/hex.c
index bd6926981c9..1da7df7e040 100644
--- a/librz/util/hex.c
+++ b/librz/util/hex.c
@@ -394,21 +394,21 @@ RZ_API int rz_hex_bin2str(const ut8 *in, int len, char *out) {
 }
 
 /**
- * \brief Takes an unsigned integer and returns the signed integer in hex format as string.
- * E.g.: 0xffffffffffffffff -> "-0x1"
+ * \brief Takes an unsigned 32bit integer with MSB set to 1 and returns the signed integer in hex format as string.
+ * E.g.: 0xffffffff -> "-0x1"
  *
  * \param in The integer to convert to the signed string.
  * \param out The buffer to write the signed hex string to.
  * \param len Length of the out buffer.
  * \return char* The signed integer as hex string.
  */
-RZ_API void rz_hex_ut2st_str(const ut64 in, RZ_INOUT char *out, const int len) {
-	if (len < 20) {
-		RZ_LOG_FATAL("Output buffer too small for 64bit value.\n");
+RZ_API void rz_hex_ut2st_str(const ut32 in, RZ_INOUT char *out, const int len) {
+	char tmp[12];
+	if (len < sizeof(tmp)) {
+		RZ_LOG_FATAL("Output buffer too small for negative 32bit value.\n");
 	}
-	char tmp[20];
-	sprintf(tmp, "-0x%x", abs((st64)in));
-	memcpy(out, tmp, 20);
+	snprintf(tmp, sizeof(tmp), "-0x%" PFMT32x, ~in + 1);
+	memcpy(out, tmp, sizeof(tmp));
 	return;
 }