diff --git a/libuavcan_drivers/lpc11c24/driver/src/clock.cpp b/libuavcan_drivers/lpc11c24/driver/src/clock.cpp
index 7a51d1be0c..21a4dc6a3e 100644
--- a/libuavcan_drivers/lpc11c24/driver/src/clock.cpp
+++ b/libuavcan_drivers/lpc11c24/driver/src/clock.cpp
@@ -35,7 +35,7 @@ const int32_t MaxUtcSpeedCorrectionX16 = 100 * 16;
 #if __GNUC__
 __attribute__((noreturn))
 #endif
-void fail()
+static void fail()
 {
     while (true) { }
 }
@@ -130,7 +130,7 @@ void adjustUtc(uavcan::UtcDuration adjustment)
             }
             else
             {
-                time_utc += adj_usec;
+                time_utc = uint64_t(int64_t(time_utc) + adj_usec);
             }
         }
         if (!utc_set)
@@ -168,7 +168,7 @@ void SysTick_Handler()
         if (utc_set)
         {
             // Values below 16 are ignored
-            time_utc += USecPerOverflow + (utc_correction_usec_per_overflow_x16 / 16);
+            time_utc += uint64_t(int32_t(USecPerOverflow) + (utc_correction_usec_per_overflow_x16 / 16));
         }
     }
     else
diff --git a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/Makefile b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/Makefile
index 901572cf6a..8d15223f54 100644
--- a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/Makefile
+++ b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/Makefile
@@ -51,7 +51,8 @@ DEF += -DNDEBUG -DCHIP_LPC11CXX -DCORE_M0 -DTHUMB_NO_INTERWORKING -U__STRICT_ANS
 
 FLAGS = -mthumb -mcpu=cortex-m0 -mno-thumb-interwork -flto -Os -g3 -Wall -Wextra -Werror -ffunction-sections \
         -fdata-sections -fno-common -fno-exceptions -fno-unwind-tables -fno-stack-protector -fomit-frame-pointer \
-        -ftracer -ftree-loop-distribute-patterns -frename-registers -freorder-blocks -fconserve-stack
+        -ftracer -ftree-loop-distribute-patterns -frename-registers -freorder-blocks -fconserve-stack \
+        -Wfloat-equal
 
 C_CPP_FLAGS = $(FLAGS) -MD -MP -MF $(DEPDIR)/$(@F).d
 
diff --git a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/main.cpp b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/main.cpp
index 68c7cb68af..9b38305baf 100644
--- a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/main.cpp
+++ b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/main.cpp
@@ -111,7 +111,7 @@ void lltoa(long long n, char buf[24])
     unsigned i = 0;
     do
     {
-        buf[i++] = n % 10 + '0';
+        buf[i++] = char(n % 10 + '0');
     }
     while ((n /= 10) > 0);
     if (sign < 0)
diff --git a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/board.cpp b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/board.cpp
index 610d923dc9..8a4125599c 100644
--- a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/board.cpp
+++ b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/board.cpp
@@ -154,6 +154,8 @@ void resetWatchdog()
 extern "C"
 {
 
+void SystemInit();
+
 void SystemInit()
 {
     board::init();
diff --git a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/crt0.c b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/crt0.c
index 49f478619f..c0de66a51b 100644
--- a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/crt0.c
+++ b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/src/sys/crt0.c
@@ -30,6 +30,17 @@ extern void SystemInit(void);
 
 #pragma GCC optimize 1
 
+/**
+ * Prototypes for the functions below
+ */
+void Reset_Handler(void);
+void Default_Handler(void);
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void SVC_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+
 /**
  * Firmware entry point
  */